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وزارات حكومية
# المواقع المعروضة 
# الموقع الزيارات
21   Link   وزارة التخطيط
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Energy Harvesting ‘Piezo-tree’ Concept

Researchers at the Cornell University have taken inspiration from nature and tried to imitate the swaying of tree branches. So what is the difference between natural swaying of trees and energy-harvesting tree created by Cornell University researchers? The flapping

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