The upper stem is threaded into the diaphragm retainernut.
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 retainernut.
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.