الوسم: electroplating)لمادة

hay this is my first thread and iam sorry for 2 things :
1-that iam writing in english
2-that iam too late (exams(

and this is my project i hope you like it
i made it on powerpoint

الملفات المرفقة

• chemicalh.rar‏ (1.23 ميجابايت, 3169 مشاهدات)

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