[油气] double valves
... 双耳止动垫圈 washer with two tap 双阀 double valves 双阀水龙头 supatap ...
bivalve
bivalve(双阀), 此释义来源于网络辞典。
dual valve
... 双串行联结式减速齿轮 dual tandem articulated type reduction gear 双阀 dual valve 双电压直流系统 dual voltage DC system ...
DD
double valve shoe
dual valve pump