- throttled directional valve
- 节流: reduce expenditure
- 换向: changing-over; change; jibe; ...
- 阀: established house or power g ...
- 换向阀: changeover valve; circuit change valve; diverter valve; diverter van; diverting valve, reversing valve; reversal valve; reversing clapper; selector ale; selector valve; shuttle ale; shuttle valve; turning valve
- 电流换向: current reversal
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