短语词组短語locking crank fastener 閉鎖緊固件self locking fastener 自鎖緊固件Self -locking prevailing torque fastener 發明名稱spring stop -nut locking fastener [機]彈簧防松螺母鎖緊件Wind turbine fastener -locking stud nut 錨固螺母 返回 locking fastener