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Yiwu Fenghua model e-commerce firm 7yr.
Main Products:Human anatomy model animal anatomy model child skeleton young skeleton adult skeleton teaching instrument model
Contacts:maomaoChat
Mobile:86-13615895667
WhatsApp:13615895667
E-mail: WeChat:13615895667
Address:23884 B, 5 Street, 2 F, 51 Gate, International Trade Mart (District 3).
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它由代表太阳、地球和月球的三个球组成,并有机械联动装置,用以演示三球关系和由此产生的一些天文现象。为了模仿自然界的真实情况,中间的太阳一般采用发光的灯泡,以照亮地球和月球。地球倾斜地在轨道上绕日旋转,月球绕地球的轨道和地球绕太阳的轨道相交成一个角度。这样就可以演示日食和月食、月球的盈亏、地球的自转和公转、昼夜和四季的交替等现象。
演示要求在遮光室内进行。用手连续推动托板,地球绕太阳公转,月亮绕地球旋转
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