longitudinally high frequency welded pipe
longitudinally high frequency welded pipe
纵向高频焊管
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The rapid analysis method of welding quality, acid washing test, for the longitudinally high frequency welded pipe is introduced.
介绍了一种快速分析高频直缝焊管焊接质量的方法——酸洗试验。
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