The core should be of such size that it can be moved up and down in the spool hole, yet will remain in any position.
核心应该是这样的规模，这是可以上下移动的阀芯孔，但将保留在任何位置。
They employ a unique, one piece center spool design that accommodates a user-supplied padlock in the closed position.
他们采用的是独特，一件中心轴设计，可容纳用户提供在关闭位置锁。
The resulting differential pressure is applied to the ends of the spool valve, raising it from its spring-centered null position.
结果导致滑阀端部产生差压并将其自弹簧中心电气零位提升。？
The resulting differential pressure is applied to the ends of the spool valve, raising it from its spring-centered null position.
结果导致滑阀端部产生差压并将其自弹簧中心电气零位提升。？
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