safety valve easing gear安全阀手动开启装置;安全阀松动装置;安全阀手动启开装置
valve with gear齿轮阀
valve actuating gear[机] 阀门传动装置;阀促动装置;气门传动机构;阀执行机构
Caprotti valve-gear卡普罗提式阀动装置
valve operating gear阀操纵装置;阀操作机构
safety valve lifting gear安全阀手动启开装置
valve-gear compartment滑阀舱
valve-gear气门传动
valve e gear气门机件
N（名词） a mechanism that operates the valves of a reciprocating engine, usually involving the use of cams, pushrods, rocker arms, etc 阀动装置