... straight pipe-line 直管线 straight(-line) knurling 直纹滚花 straight-line machine 直线式拉丝机 ...
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When the valve is open, it is like a straight piece of pipe in the line.
当阀门处于开启状态时，整个阀门就像管线上的一段管道一样。
NOTE: Always connect equalizer pipe into a straight run of the line, as shown.
注：如图所示，始终将平衡管连接进直线管道内。
The flying sawing machine is one of the key units of the straight welded pipe production line.
飞锯是直缝焊管生产线上的关键设备之一。
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