Oscillating Machine
50 بار بازدید -
7 سال پیش
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An object is in motion
An object is in motion if it is moving relative to another object. Motion is a relative quantity and is expressed in respect to the position of another object.
http://www.veproject1.org/
7 سال پیش
در تاریخ 1396/04/29 منتشر شده
است.
50
بـار بازدید شده