当挠性管柱被轧制时，焊缝的螺旋形使得在焊缝处增强了管子的性能。
When the tubing string is milled, the helical weld form provides enhanced characteristics of the tube at the weld site.
当挠性管柱被轧制时，焊缝的螺旋形使得在焊缝处增强了管子的性能。
When the tubing string is milled, the helical weld form provides enhanced characteristics of the tube at the weld site.
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