fail-safe
フェイルセーフ
Fail-fast
Control theory
Dead man's switch
EIA-485
elegant degradation
Failing badly
fail-deadly
Fault tolerance
IEC 61508
Interlock
Safe-life design
safety engineering
/suto3/google.iconfail safe
image fail safe
define fail safe
wikipedia fail safe
weblio fail safe
kotobank fail safe
jisho fail safe