The spectrums of degree, structural component and multiple hinges are defined according to the basic parameters of planar closed kinematic chain with multiple hinges.
2
设B是一个复的向量空间，它是由环链在平环上的简单闭曲线生成。
Let B be a complex vector space generated by some simple closed curves in the annulus.
3
分析了粉末烧结材料镦粗和复压工艺的致密效果，提出了闭式模锻工艺设计原则。
The densification effects of upsetting and repressing are compared, and a technology design principle for closed die forging is suggested .
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