79. الفصل التاسع والسبعون - زنك (توتياء) ومصنوعاته
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50. الفصـــل الخمســــــون - حــريــر طبيعي
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96. الفصل السادس والتسعون - مصنوعـات متنوعـة
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry’s standard dummy text…
40. الفصل الأربعون - مطاط ومصنوعاته
It is a long established fact that a reader will be distracted by the readable content of a page when…
