There is a strict procedure you must follow: first make sure the safety catch is on.有一个你必须严格遵循的程序：首先务必将保险栓拉上。I couldn't free the safety catch.我解不开保险栓。He could not unload the weapon without first disengaging the safety catch.因为没有先把保险栓打开，他没法把子弹退出来。Eddie slipped the safety catch on his automatic back into place.埃迪将自动步枪的保险栓重新拉上。