- change over valve
- tra fer valve
- transfer valve
- 变换: vary; alternate; commutation ...
- 阀: established house or power g ...
- 交换阀: crossover valve; interchange valve
- 切换阀: block valve
- 转换阀: change over valve; change valve; commutation value; conversion valve; cross valve; diverter valve; exchange-over valve; shift over valve; switch value; switch valve
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