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。
The accumulator is a strip storing unit in the longitudinally welded pipe and formed section production.
套 是高频直缝焊管生产线和冷弯型钢生产线中的储料装置。
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