自锁self-locking
自锁螺母self-locking nut
【运输】自动锁上，扳钳self-locking action wrench
四用自锁游标卡尺four-usage and self-locking vernier caliper
自锁螺母self-locking nut【机】
外部自锁表征external self-locking flag【计】
自锁条件condition of self-locking【机】
自锁self-hold【电】;self-locking【计】;