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1·The upper stem is threaded into the diaphragm retainer nut.

上阀杆通过丝口旋在横膈膜止动螺母里。

2·The upper stem is threaded into the diaphragm retainer nut.

手轮下面是一个六角形外螺纹横膈膜止动螺母。

3·Usually there are 12 categories which are bolt , stud, screw, nut , self tapping screw, wood screw, gasket, retainer ring, pin, composite member, bolting, and soldering lamp.

它通常包括以下十二类零件：螺栓、螺柱、螺钉、螺母、自攻螺钉、木螺钉、垫圈、挡圈、销、组合件和连接副、焊钉等。