four-way plug valve
... 三通旋塞阀three-way plug valve 四通旋塞阀four-way plug valve 旋塞cock ...
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... 五、旋塞阀 plug valve 三通旋塞阀 three-way plug valve 四通旋塞阀 four ...
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直通式旋塞阀主要做切断用，三通式和四通式用于分配用于分配介质流量。
Straight-through processing Xuan Sefa mainly used to do cut off, three-and four-way-to medium allocated for the distribution of traffic.
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