Straight seam welded pipe crew
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Mozambique WBHO Company ERW630
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Zhejiang Jiuli Group ERW630 straight seam high -frequency welding pipe unit
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ERW610, Huludao Qixing Steel Pipe Group
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Zhejiang Jinzhou Group ERW219
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Guangzhou Yizheng Steel Pipe Co., Ltd.
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Liaoyang large pipe factory ERW630 straight seam high -frequency high -frequency welded pipe unit
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Shanxi Guolian Method Management Co., Ltd. ERW508