n. 自动防故障装置
a. 自动防故障装置的
【计】 故障保险
【化】 破损安全
n.
A device which, if (or when) it fails, fails in a way that will cause no harm or at least a minimum of harm to other devices or danger to personnel.

fail safe fail-safe instrument fail safe system fail-safe program fail safe operation fail safe safety interlock fail-safe test fail-safe design fail-safe nature fail-safe operation fail-safe spring brake