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.
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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