连接螺母

临时拧紧马达边的N型连接螺母.

拧紧丝杆边的N型连接螺母.

检查隔膜，拆卸连接螺母(6)并提升压力板(7)。

hose coupling

coupling

Glaser coupling

rotary-drilling machine with coupling (hitch) for mining

quick-acting coupling, locking by means of locking balls

radial pin coupling【机】

casing coupling

galvanized reducing coupling