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استخدام المادة الهجينة متغيرة الطور/ النانوية في المجمع الشمسي ذو القطع المكافئ == Hybrid Nano / Phase Change Material Used in Trough Solar Collector

Author name: عبد المهيمن عادل عبد
Supervisor name: منى صباح قاسم
General topic: Mechanical Engineering
Specific topic: Mechanical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Mechanical Engineering
Language: English
University location: Baghdad
First pages:

تصميم وتنفيذ منظومة سيطرة على سرعة محفز هيدروليكي باستخدام صمامات هيدروليكية == Design and Implementation of Speed Control System for Hydraulic Actuator Using Solenoid Valves

Author name: عبد الله هاشم محمد
Supervisor name: ناظم مجبل فالح | مناف فتحي بدر
General topic: Mechanical Engineering
Specific topic: Applied Mechanics
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Mechanical Engineering
Language: English
University location: Baghdad
First pages:

دراسة تاثير استخدام مواد متغيرة الطور على اداء النظام الكهروضوئي == Study the effect of employing PCM on the Performance of PV System

Author name: عادل مناتي حسين
Supervisor name: منى صباح قاسم
General topic: Mechanical Engineering
Specific topic: Mechanical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Mechanical Engineering
Language: English
University location: Baghdad
First pages:

دور الاضافات النانوية على سلوك الكسر لالواح من المواد المركبة المثقوبة قبل وبعد الصب == Role of Nano - Additives on Fracture Behavior of Drilled and Moulded - in Holes Composite Panels

Author name: شيماء حاتم مهدي
Supervisor name: احسان صباح الامين
General topic: Mechanical Engineering
Specific topic: Applied Mechanics
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Mechanical Engineering
Language: English
University location: Baghdad
First pages:

التحقق في المواد المتدرجة وظيفيا ذات الثقوب تحت الاحمال الساكنة والديناميكية == Investigation of Functionally Graded Materials with Holes Under Static and Dynamic Loads

Author name: شهد قصي عبد القادر
Supervisor name: بشار عويد بديوي
General topic: Mechanical Engineering
Specific topic: Applied Mechanics
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Mechanical Engineering
Language: English
University location: Baghdad
First pages:

تحسين الاداء لمجمع الطاقة الشمسية ذو الالواح المسطحة باستخدام انواع مختلفة من الاشرطة الملتوية == Enhanced performance of flat plate solar collector using various type of twisted tape.

Author name: سناء حسن عبيد
Supervisor name: باسمة سلمان
General topic: Mechanical Engineering
Specific topic: Mechanical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Mechanical Engineering
Language: English
University location: Baghdad
First pages:

تحسين الخصائص الحرارية - الهيدروليكية لجريان اضطرابي داخل قنوات متعرجة مختلفة == Enhancement of Thermal - Hydraulic Properties for Turbulent Flow Inside Different Corrugated Channels.

Author name: سلوى احمد سارو
Supervisor name: سعد نجيب شهاب
General topic: Mechanical Engineering
Specific topic: Mechanical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Mechanical Engineering
Language: English
University location: Baghdad
First pages:

الاداء الحراري لطبق مكافئ شمسي مع مستقبل حلزوني مخروطي == THERMAL PERFORMANCE OF SOLAR PARABOLIC DISH WITH A HELICAL - CONICAL RECEIVER

Author name: سعود تميم طاهر
Supervisor name: مشعل عبد الامير عبد الكريم
General topic: Mechanical Engineering
Specific topic: Thermal Power
Degree: Doctorate
University: Mustansiriyah University - College Of Engineering - Department Of Mechanical Engineering
Language: English
University location: Baghdad
First pages:

دراسة عددية وعملية لتحسين الاداء الحراري المائي للمشتتات الحرارية الصغيرة == Numerical and Experimental Study of the Hydro - Thermal Performance Enhancement of a MiniChannel Heat Sink

Author name: رقية سلام حسين
Supervisor name: احسان علي غني
General topic: Mechanical Engineering
Specific topic: Mechanical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Mechanical Engineering
Language: English
University location: Baghdad
First pages:

دراسة عملية وعددية للتحقق من اداء المبادل الحراري باستخدام التنظيف الذاتي == Experimental and Numerical Investigation of Heat Exchanger Performance using Self - Cleaning Technology

Author name: حيدر لفته عنيد
Supervisor name: ضمياء سعد خضر
General topic: Mechanical Engineering
Specific topic: Mechanical Engineering
Degree: Doctorate
University: Mustansiriyah University - College Of Engineering - Department Of Mechanical Engineering
Language: English
University location: Baghdad
First pages:

تحسين الخصائص الحرارية للمواد مغلقة متغيرة الطور باستخدام رغوة نحاسية == Enhancement of Thermal Characteristics of Encapsulated Phase Change Materials Using Copper Foam

Author name: حسين علي احمد
Supervisor name: معاذ عبد الواحد ذيب
General topic: Mechanical Engineering
Specific topic: Mechanical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Mechanical Engineering
Language: English
University location: Baghdad
First pages:

استخدام المعالجة الصورية لتحري دمج وفصل المواد بالاهتزاز == Using Image Processing To Investigate Mixing And Separation Of Materials By Vibration

Author name: حسين علوان خضير
Supervisor name: ناظم مجبل فالح | ليلى مطر ناصر
General topic: Mechanical Engineering
Specific topic: Applied Mechanics
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Mechanical Engineering
Language: English
University location: Baghdad
First pages:

السلوك الميكانيكي للمواد البلاستيكية المعاد تدويرها المقواة بالياف الزجاج == Mechanical Behavior of Recycled Plastic Materials Reinforced With Fiberglass

Author name: حسام محسن كريم
Supervisor name: فاضل عباس عبد الله
General topic: Mechanical Engineering
Specific topic: Mechanical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Mechanical Engineering
Language: English
University location: Baghdad
First pages:

تحسين خصائص الجريان الهيدروليكية والحرارية لمجموعة انابيب متقاطعة الجريان == Improving of Thermal and Hydraulic Flow Characteristics a Cross-Flow Tubes Bank

Author name: حسام رشيد خضير
Supervisor name: سعد نجيب شهاب
General topic: Mechanical Engineering
Specific topic: Mechanical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Mechanical Engineering
Language: English
University location: Baghdad
First pages:

دراسة عددية وعملية لتحسين الاداء الحراري لنظام التبريد بالسائل لمعالج الكمبيوتر == Numerical and Experimental Investigation of Thermal Performance Enhancement of Liquid Cooling System for Computer Processor

Author name: حازم علوان مجبل
Supervisor name: حيدر محمد جفال
General topic: Mechanical Engineering
Specific topic: Mechanical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Mechanical Engineering
Language: English
University location: Baghdad
First pages:

تحليل الواح سندويتشية مركبة من الياف الكاربون ذات نوى قرص العسل معرضة لحمل انحناء ذي ثلاث نقاط == Analysis of Carbon Fiber Sandwich Panels with Squire Honeycomb Cores Subjected to Three-Point Bending Loads

Author name: جعفر محمد علي محب
Supervisor name: احسان صباح الامين
General topic: Mechanical Engineering
Specific topic: Applied Mechanics
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Mechanical Engineering
Language: English
University location: Baghdad
First pages:

تقصي عملي لتحسين العوازل الحرارية باستخدام المواد النانوية == Experimental Investigation for Enhancing Thermal Insulations Using the Nano-Materials

Author name: جعفر جابر عبد الحميد الخاقاني
Supervisor name: توفيق وسمي محمد
General topic: Mechanical Engineering
Specific topic: Mechanical Engineering
Degree: Doctorate
University: Mustansiriyah University - College Of Engineering - Department Of Mechanical Engineering
Language: English
University location: Baghdad
First pages:

تصنيع ماكنة فصل نفايات صلبة وهاضم لا هوائي == Fabrication of a solid Waste Separation Machine and Anaerobic Digester

Author name: بشير عبد الرزاق غني
Supervisor name: ناظم مجبل فالح
General topic: Mechanical Engineering
Specific topic: Applied Mechanics
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Mechanical Engineering
Language: English
University location: Baghdad
First pages:

محاكاة عددية وتجريبية لخصائص الجريان وانتقال الحرارة داخل تجويف حلقي ذو انبوب داخلي ملتوي == Numerical and Experimental Simulation of Flow and Heat Transfer Characteristics into a Twisted Inner Tube Annulus

Author name: براء محمد سلمان
Supervisor name: سعد نجيب شهاب
General topic: Mechanical Engineering
Specific topic: Mechanical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Mechanical Engineering
Language: English
University location: Baghdad
First pages:

دراسة العزل الحراري المستدام باستخدام انواع مختلفة من المخلفات == Study of Sustainable Thermal Insulations Using Different Types of Waste Materials

Author name: اميرة عامر حميد
Supervisor name: سمهري عبد الرضا عبد الله
General topic: Mechanical Engineering
Specific topic: Mechanical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Mechanical Engineering
Language: English
University location: Baghdad
First pages:

تحليل الطاقة والطاقة المتاحة للاداء الثرمو - هيدروليكي لمبادل حراري نوع الدائرة المطبوعة == Energy and Exergy Analysis of the Thermal - Hydraulic Performance for a Printed Circuit Heat Exchanger

Author name: احمد عليوي سمرمد
Supervisor name: حيدر محمد جفال
General topic: Mechanical Engineering
Specific topic: Mechanical Engineering
Degree: Doctorate
University: Mustansiriyah University - College Of Engineering - Department Of Mechanical Engineering
Language: English
University location: Baghdad
First pages:

التحليل الديناميكي للالواح المركبة ذات النواة المعدنية على شكل قرص العسل == Dynamic Analysis of Composite Panels with Honeycomb Metal Core

Author name: احمد علي خالد
Supervisor name: فاضل عباس عبد الله
General topic: Mechanical Engineering
Specific topic: Applied Mechanics
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Mechanical Engineering
Language: English
University location: Baghdad
First pages:

تعزيز الخواص الميكانيكية لترميم مواد طب الاسنان باستخدام مسحوق نوى التمر == Enhancing the Mechanical Properties of Restorative Dental Materials Using Date Seeds Powder

Author name: فريال عادل طالب
Supervisor name: لبنى غالب
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

انتقال الشحنة بين ذرة (ايون) وسطوح المعادن 1 - تعادل ايون - سطح 2 - دراسة في نظرية الالتصاق الكيمياوي == Charge Transfer Between Atom (Ion) and Metal Surfaces Part 1: Surface Ion Neutralization. Part 2: Study in the Chemisorption Theory.

Author name: جنان مجيد المخ
Supervisor name: shakier i. easa
General topic: Production engineering metallurgy and materials
Specific topic: Solid State and Materials Physics
Degree: Doctorate
University: University Of Basrah - College Of Science
Language: English
University location: Basrah
First pages:

الخواص الكهربائية والضوئية للبوليمرات الموصلة (PT,PT/PTFE,PT/PVC) وتطبيقاتها في البطاريات القابلة للشحن == The Electrical and Optical Properties of Conducting Polymers (PT,PT/PTFE, PT/PVC) and their Application in Rechargeable Batteries

Author name: كريمة مجيد زيدان
Supervisor name: kays s. majdi
General topic: Production engineering metallurgy and materials
Specific topic: Solid State and Materials Physics
Degree: Doctorate
University: University Of Basrah - College Of Science
Language: English
University location: Basrah
First pages:

THE STRENGTH AND DUCTILITV OF CONTINUOUSLY CAST STEELS ABOVE 800°C

Author name: TOFFIK MAHDI M. AL-SAAD
Supervisor name: SALIH A. NAJIM
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Master
University: University Of Basrah - College Of Engineering - Department of Production
Language: English
University location: Basrah
First pages:

دراسة الموصلية الحرارية والخواص العازلية, تقنية وقياس لمواد متراكبة محضرة من الالومينا والالومنيوم والريزول لمصفوفة من البوليمر == STUDY OF THERMAL CONDUCTIVITY AND DIELECTRIC PROPERTIES; TECHNIQUES AND MEASUREMENTS FOR THE COMPOSITES PEPARED FROM ALUMINA, ALUMINUM AND RESOLE; POLYMER MATRIX.

Author name: وليد علي حسين
Supervisor name: WAEL A. S. ABDUL-GHAFOR
General topic: Production engineering metallurgy and materials
Specific topic: Solid State and Materials Physics
Degree: Doctorate
University: University Of Basrah - Faculty Of Education
Language: English
University location: Basrah
First pages:

النمو البلوري والخواص الالكترونية لبعض اشباه الموصلات المركبة نوع chalcopyrite == Crystal Growth and Electronic Properties of Some Multinary Chalcopyrite Semiconductors (AgInSe1.75Teo.25, AgAlSeo.sTejJ, AgIno.6Alo.4Seo.75Te1.25)

Author name: واثق ايوب طه
Supervisor name: kays s. majdi
General topic: Production engineering metallurgy and materials
Specific topic: Solid State and Materials Physics
Degree: Doctorate
University: University Of Basrah - College Of Science
Language: English
University location: Basrah
First pages:

دراسة تاثير مضافات مختلفة على خواص متراكبات الايبوكسي == Studying the Effect of Different additives on Properties of Epoxy - Matrix Composite Materials

Author name: حسنين محمد نحو
Supervisor name: رعد مزاحم فنجان | احمد عبد الحسين عياش
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

دراسة بعض الخصائص الميكانيكية والفيزيائية لمواد بوليمرية مدعمة بمواد طبيعية == Studying Some Mechanical and Physical Properties of Polymer Reinforced by Natural Materials

Author name: هشام عبد الزهرة جلوب
Supervisor name: رعد مزاحم فنجان
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

تصنيع اطقم اسنان من بولي ميثيل ميثاكريلايت المقواة بالسليلوز وبذور الكمون == Manufacturing of Dentures from PMMA Reinforced by Cellulose and Cumin Seeds

Author name: هبه اوس علوان
Supervisor name: خالد مرشد عويد | رؤوف محمود رؤوف
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

تصميم وفحص قدم صناعية جديدة ذات عارض مرن == Design and Testing of a New Prosthetic Foot with a Flexible Keel

Author name: هبه احمد عبد الوهاب
Supervisor name: كاظم كامل رسن
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

دراسة خواص المتراكبات البوليمرية المقواة بالياف طبيعية == Study the Properties of Polymeric Composites Reinforced by Natural Fibers

Author name: سراء علي منصور
Supervisor name: عامر حميد مجيد
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

دراسة تاثير المواد التكميلية على سلوك مونة الاسمنت المتراكب == Study the Effect of Supplementary Materials on the Behavior of Cement Mortar Composites

Author name: سامر جعفر غازي
Supervisor name: محمد جواد كاظم
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

تاثير التبلور على الخواص الحرارية الفيزيائية لبوليمرات التلدن الحراري : المقارنة التجريبية والنظرية == Crystallinity Effect on the Thermo - physical Properties of Thermoplastic Polymers: Experimental and Theoretical comparison

Author name: نور صباح زكي فاضل
Supervisor name: توفيق وسمي محمد
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

خصائص راتنج الايبوكسي الممزوج بالبوليمر المعاد تدويره : جوانب من الخواص الفيزيائية - الحرارية والميكانيكية == Characteristics of Epoxy Resin blended with Recycled Polymers: Aspects on Thermo - physical and Mechanical Properties

Author name: ساره عبد القادر عمر
Supervisor name: توفيق وسمي محمد | ياسر خليل ابراهيم
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

تصميم، تصنيع واختبار ساق جديد من مواد متدرجة وظيفيا للمبتورة اطرافهم اسفل الركبة == Design, for Manufacturing and Testing of a New Prosthetic Functional Graded Materials for a Below Knee Amputation

Author name: زينب حميد زاير
Supervisor name: كاظم كامل رسن
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

دراسة تاثير بعض عوامل الالياف على الخصائص الفيزيائية والميكانيكية للمتراكبات ذات الاساس السمنتي == Investigation the effect of some fiber factors on physical and Mechanical Properties of Cement based composites

Author name: ندى حمد خلف
Supervisor name: ياسر خليل ابراهيم | صاحب محمد مهدي
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

السلوك الميكانيكي للايبوكسي ذو الاساس الممزوج مع الياف الكربون والكفلر == Mechanical Behavior of epoxy blend matrix with Carbon fiber and Kevlar

Author name: مهند صلاح حسن
Supervisor name: ياسر خليل ابراهيم | اسماعيل ابراهيم مرهون
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

تاثيرات عوامل لحام المسمار الاحتكاكي على الخواص الميكانيكية والبنية المجهرية للسبائك الغير متماثلة == Effects of Friction Stud Welding Parameters on Mechanical Properties and Microstructures of Dissimilar Alloys

Author name: مصطفى سعد كاظم
Supervisor name: كاظم كامل رسن
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

تحسين الاستقرار الحجمي للسمنت الابيض == Improve the volumetric stability of white cement

Author name: مروه عبد الكريم عنبر
Supervisor name: محمد علي عبد الرحمن
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

انتاج خرسانة جيوبوليمرية ملونة باستخدام الرماد المتطاير كمادة اساسية == Production of Colored Geopolymer Concrete using fly ash as a base material

Author name: محمد قاسم مطير
Supervisor name: خالد مرشد عويد | محمد علي عبد الرحمن
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

دراسة تاثير الاصباغ على بعض الخصائص للخرسانة الجيوبوليمرية == Study the Effect of Pigments on Some Properties of Geopolymer Concrete

Author name: محمد حميد محمود
Supervisor name: محمد علي عبدالرحمن
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

دراسة السلوكيات الفيزيائية والميكانيكية لمتراكبات مونة ايبوكسي - سمنت == Investigation the Physical and Mechanical Behaviours of Epoxy - Cement Mortars Composites

Author name: محمد جاسم محمد
Supervisor name: خالد مرشد عويد | رؤوف محمود رؤوف
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

تاثير اعادة التدوير على موروفولوجيا وخصائص المواد البلاستيكية الحرارية == The Effect of Recycling on the Morphology and Properties of Thermoplastic Materials

Author name: لبنى سعدون كامل
Supervisor name: توفيق وسمي محمد
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

دراسة الخصائص الفيزيائية والميكانيكية لرغوة البولي يورثان المتراكب المحضر من البوليول الحيوي == Study the Physical and Mechanical Properties of Rigid Polyurethane Foam Composite Prepared from Bio - based Polyol

Author name: قصي ناصر حسين
Supervisor name: عامر حميد مجيد
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

تاثير دقائق الزركونيا والتيتانيا على مونة الجيوبوليمر المعدل بالسيليكا == The Influence of Zirconia and Titania Particles on Silica – Modified Geopolymer Mortar

Author name: فاطمة محمد علوان
Supervisor name: حمزة مصطفى كمال
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

تاثير بعض المضافات المعدنية وبولي فينيل الكحول على خواص مونة السمنت == Effect of Some Mineral Admixtures and Polyvinylalcohol on the Properties of Cement Mortar

Author name: علي محمد فليح
Supervisor name: خالد مرشد عويد
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

دراسة تاثير انواع البوليمر على خواص مونة الاسمنت المعدلة بالبوليمر == Study and Investigation the Effect of Polymer Types on the Polymer Modified Cement Mortar Properties

Author name: علي كاظم سلمان
Supervisor name: خالد مرشد عويد | رؤوف محمود رؤوف
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:

انتاج حديد الزهر ذي الكرافيت الكروي من اعادة تدوير سكراب حديد الزهر الرمادي باستخدام فرن البودقة == Production of Spheroidal Graphite Cast Iron From Recycling Grey Cast Iron Scrap Using Oil - Fired Crucible Furnace

Author name: علي عبد الزهرة مناتي
Supervisor name: كاظم كامل رسن
General topic: Production engineering metallurgy and materials
Specific topic: Materials Engineering
Degree: Master
University: Mustansiriyah University
Language: English
University location: Baghdad
First pages:
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