求翻译：螺旋扁管的制造过程由“压扁”、“热扭”两个过程完成，管子截面类似于椭圆管，长圆的长、短轴之比值根据换热器的管程和壳程的流速设计确定，当管程流量较低时，可增大长、短轴之比值，减少流通面积以提高流速，使换热器两侧处于较理想的流动状态。是什么意思？

Spiral flat tube manufacturing process by "flattening", "hot twist the two processes to complete, the pipe cross-section similar to the oval tube, oval long and short axis ratio determined according to the heat exchanger tube side and shell side flow rate design When the pipe-way traffic volume is l

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The screw flat tube manufacture process by “compressing”, “turns two processes to complete hotly”, the pipe section is similar to the elliptical tube, the oval length, ratio of basis heat interchanger minor axis tube Cheng Heke the regulation speed of flow design determination, when the tube regulat

Spiral flat tube of manufacturing process by "pressure flat", and "hot twist" two process completed, tubes section similar Yu oval tube, long of long, and short axis of ratio under heat exchanger of tube pass and shell range of velocity design determines, dang tube range flow lower Shi, can increase

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