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1·Mating connectors must be clean, must meet connector type interface, and must be tightened to the appropriate torque specification.

匹配连接器必须是清洁的，必须满足连接器类型接口，并且必须符合相应的扭矩技术指标。

2·Then, the method of building the assembly model, recognizing mating constraint type based engineering knowledge, the algorithm of inferring relative freedom of mating feature are given.

并给出装配模型的建立过程及基于工程知识的装配配合约束类型识别方法、配合特征相对自由度推理算法。

3·This type mating creeper gear used in machinery of packing, traffic, metallurgy, mine and so on.

常与减速机配套用在运输，冶金，提升机，矿山，电力等设备上。

4·GY-1 mill stand is a new type of housingless mill based on the design principle of short stress path and fewer mating surface.

本文对GY-1型短应力线轧机的基本特点及力学原理进行了初步分析。