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1·Socket clevis is forgeable iron, hot galvanizing. spring catch bronze or stainless steel.

碗头挂板为可锻铸铁件，热镀锌。弹簧销为青铜件或不锈钢件。

2·Meanwhile, the improvement advices for the structure and maintenance of the roller end clevis are provided.

并对辊端叉头的结构和维护提出改进意见。

3·The key problem to be solved in establishing function resultant mechanism by analytic method is to calculate the equation of two connected rod clevis.

用解析法设计函数生成机构，要解决的关键问题是两连架杆位置方程式的求解。