A solid body, moving in space, that is smaller than an asteroid and at least as large as a speck of dust.
流星体活动在空间的固体天体，比小行星小，至少与尘埃一样大。
The machine should be required to have a small and light body with quick moving, and the manufactured iron scrap easy to be stacked for saving the space.
要求机器具有轻便、移动方便、挤压成型铁屑块便于堆放、节省空间等特点。
The movement of multi-rigid-body system interconnected by smooth hinge moving in space and plane are deeply studied with the discrete time transfer matrix method of multibody system.
深入探讨多体系统离散时间传递矩阵法对平面、间刚体光滑铰多体系统运动响应的研究。
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