压力真空断路器
pressure and vacuum breaker
压力及真空表测试器
pressure and vacuum gauge tester
真空电离压力计
vacuum ionization manometer
真空调制压力
vacuum modulator pressure
电子纺纱真空调节
electronic spinning vacuum adjutment
电离真空压力计
vacuum ionization manometer
ionization vacuum gauge
电接点真空压力表
Electric contact pressure gauge vacuum
第四代真空射流装置
the fourth-generation vacuum jet
低真空运行
low vaccum running
operation under low vacuum
低真空变压
coarse vacuum pressure alterable
Low vacuum varying pressure
Low vacuum transformable pressure
低压真空断路器
LV vacuum circuit breaker
low voltage vacuum circuit breaker