摸具的所有的设计对于零件来说尺寸过小.The overall design of the tools were undersized for the parts.坐鞍是马具的一部分.The saddle is a part of a horse's harness.介绍了一种细长螺旋件加工输具的结构及加工方法.The structure and process of a threaded shaft are introduce...