flow 用在机械上是什么意思?以下这句想了半天也没翻译出来,哪位高人能帮帮忙?谢谢!two-way valves in the fully open position have the index marking on the top of the valve stem ,parallel with the direction of flow.two-way

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flow 用在机械上是什么意思?以下这句想了半天也没翻译出来,哪位高人能帮帮忙?谢谢!two-way valves in the fully open position have the index marking on the top of the valve stem ,parallel with the direction of flow.two-way
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flow 用在机械上是什么意思?以下这句想了半天也没翻译出来,哪位高人能帮帮忙?谢谢!two-way valves in the fully open position have the index marking on the top of the valve stem ,parallel with the direction of flow.two-way
flow 用在机械上是什么意思?
以下这句想了半天也没翻译出来,哪位高人能帮帮忙?谢谢!
two-way valves in the fully open position have the index marking on the top of the valve stem ,parallel with the direction of flow.two-way valves in the fully closed position have the index marking perpendicular to the direction of flow.

flow 用在机械上是什么意思?以下这句想了半天也没翻译出来,哪位高人能帮帮忙?谢谢!two-way valves in the fully open position have the index marking on the top of the valve stem ,parallel with the direction of flow.two-way
大致的意思是:
2位的阀在完全开启的位置,在标签上的图示为平行的2根线,(估计是带箭头的线,表示介质的流动方向);2位的阀在完全闭合的位置,在标签上的图示为相交的2根线,(估计是带箭头的线,表示介质的流动方向);