relay-operated controller
relay-operated accumulator
Residual Current Operated Relay
air-operated controller
airoperated controller
Electrically operated controller
fluid-operated controller
pilot operated controller
remote-operated controller
self operated controller
self-operated controller
自控式调节器
自操作控制器
自给能控制器
自力式控制器
自作用控制器
自动控制器
FR-FR Frame Relay – to – Frame Relay
phase-rotation relay phase-sequence relay
phase-sequence relay phase-rotation relay
slow-release relay (=slow-releasing relay)