加热器阀按钮  heater valve knob

喇叭阀按钮  horn valve button

操作钮  operating knob; buttons， functioi; buttons; functioi

补给阀操作  makeup valve operation

操作阀  operating valve

操作作战特性  Operational characteristics

出口急停阀操作员  outlet scram valve operator

第四阀操作  fourth valve operation

电磁操作阀  solenoid operated valve

电动操作阀  MOV (motor-operated valve

多工作操作  operation， NOT; azimuth adjustment; Operation; not

方向螺线管操作阀  directional solenoid operated valve

非同作操作系统  nonconcurrent operating system; NCOS

隔膜操作阀  diaphragm operated valve

隔膜式操作阀  diaphragm operate valve

工作(操作)极限  operational limit

工作操作  Operation

工作操作系统  WOS Working Operating System

关断阀操作开关  analysis on the result