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السبت، 14 مايو 2016

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https://www.youtube.com/watch?v=vqktxUF0nKYhttps://www.youtube.com/watch?v=C-4GrSZBv84السلام عليكم ورحمة الله وبركاته
هذا رابط فيديو يشرح اشواط المحرك الحراري
https://www.youtube.com/watch?v=C-4GrSZBv84

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