Before installation, check line of flow through valve so that valve will function properly.
安装前，切断通过阀门的流体，以使阀门工作正常。
Railway passenger station always put the passenger flow line as the focus of design ideas.
铁路客运站历来把旅客流线作为其设计构思的重点。
The line of the stain shows the flow of time.
这条污痕体现了时间的流逝。
The center line of the flow care is partial to the inner side of annulus.
流核中心线偏离环空中心线，且偏向环空内侧。
The center line of the flow care is partial to the inner side of annulus.
流核中心线偏离环空中心线，且偏向环空内侧。
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