打开安全杆 Open Safety Bar
打开过顶安全杆 Open Overhead Safety Bar
关上安全杆 Close safety bar
关上过顶安全杆 Close overhead safety bar
安全抓杆 grab bar
杠杆安全阀 lever safety valve
杠杆式安全阀 deadweight safety valve ; [机] lever safety valve ; lever and weight loaded safety valve ; weighted lever safety valve
单杆安全阀 single-lever relief valve
方钻杆安全阀 kelly safety valve
当要求进入电梯底坑的时候，必须首先打开控制柜中主开关IG，然后把安全杆转到工作位置；
When entering the elevator pit is required, firstly turn on the main switch IG in the control cabinet, and then switch the safety rod to the working position;
控制杆可让安全密室里的人锁上或打开房子里的任何门，来捕捉入侵者。
A joystick allows the safe room occupant to lock and unlock doors throughout the house to trap an intruder.
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