من هو مخترع مكبر الصوت؟

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02 فبراير 2013

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مكبر الصوت هو جهاز كهربائي يقوم بتكبير الصوت
، اخترعه العالم الألماني إرنس ويرمر عام 1877.

اختراعات واكتشافات

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أخر المواضيع من قسم : اختراعات واكتشافات

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