noun
exhaust valve
Technical term for a valve that releases exhaust gas or fluid. Often used in mechanical and engineering contexts.
See also: 排気弁
エンジンの排出弁が故障した。
The engine's exhaust valve broke down.
Compound of 排出 (exhaust, discharge) and 弁 (valve). The exact historical derivation is uncertain, but the term follows standard Sino-Japanese technical word formation.