inner pipe ; tube insert
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凝结换热系数随内管径的增大而减小。
The heat transfer coefficient increased with the inner tube diameter decreased.
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你知道怎样修补内管吗？
Do you know how to patch an inner tube?
本文分析计算了石油钻井工程偏心环空中内管转动的螺旋流动。
In this paper the spiral velocity of eccentric annulus with inner pipe turned is analysed and computed.
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