straight resistance valve
... straight razor 直形剃刀 straight resistance valve 直阻阀 straight roller bearing 一般滚柱轴承 ...
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流通能力大、流阻小。这是因为开启后阀芯位于藏球室内，阀体流道呈直筒式。
Flowing capability is big and the flow resistance is little. When the valve opening, the valve core is located inside ball cavity and the flow route is straight tube.
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