safety lock

基本解释

It also features a hidden clasp with a safety lock for security.
而且它還有一個隱藏的安全鎖來確保安全。
Machine parked WaJi's top after, pull up safety lock shaft to lock position.
機器停放在挖機平板車上麪之後，拉起安全鎖定杆到鎖定位置。
Fit the rig tongs with the correct jaws for the drill pipe tool joint or the drill collar. Re-install the safety lock springs.
給大鉗裝上與鑽杆接頭或鑽鋌相匹配的鉗頭，再裝上安全鎖簧。
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