ān​quán​fá

safety valve

安全阀 安全閥 ān​quán​fá
safety valve
A device used on boilers, pressure vessels, or water pipes that automatically opens to release pressure and prevent damage
safety valve; safeguard
A figurative outlet for venting pressure or tension to prevent disaster

Frequency

Movie subtitles
0.120 per million appears in 0% of films
Written text
0.244 per million

Sources