safety catch

美 
英 
  • n.(枪、炮等的)保险机;(机器设备的)安全掣子
  • 网络安全挡;断绳保险器防坠器;扣上
复数:safety catches  
safety catch
n.
1.
(枪、炮等的)保险机,保险栓;(机器设备的)安全掣子a device that stops a gun from being fired or a machine from working by accident