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API 5L X52M steel pipe

3PE coating steel pipe

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Welded steel pipe for low pressure fluid transmission (GB / t3092-1993) is also known as general welded pipe, commonly known as black pipe. It is a welded steel pipe used for conveying water, gas, air, oil, heating steam and other general low pressure flu

Straight seam steel pipe production process: plate detection: after the steel plate used to manufacture large-diameter submerged arc welded straight seam steel pipe enters the production line, the whole plate shall be subject to ultrasonic inspection for

如果把去产能比作中国在经济转型道路上的一个弯道，那么速度太慢会影响转型进展，速度太快就可能危及行车安然，车子开不稳也将有损乘客的感受。