It realized digital of nondestructive testing for spiral welded pipe.

实现了螺旋焊管无损检测的数字化.

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Spiral welded pipe to improve product quality and stability of the company's strong support economic efficiency.

螺旋焊管产品质量的稳定提高是公司经济效益提高的有力保障.

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The residual stress imposes considerable negative influence on quality of the spiral welded pipe.

残余应力对螺旋焊管质量有显著影响.

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