Protracting object's free-body diagram is a course of analysising object's force from other object.
画受力图是解决力学问题关键的一步。
And thirdly , some samples have been made geochemical elements analysising.
部分样品进行地球化学元素分析实验。
On the base of analysising the grab capability , this paper reseachs how to use data design technology by using feasible optimize method .
在分析挖掘机性能要求的基础上，利用切实可行的优化方法，对其进行参数化设计。
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