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　　Qingdao Xiangxing Steel Pipe Co., Ltd. and Shanghai Sun Metal Products Co., Ltd. are holding subsidiaries of Qingdao ...

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　　Our company can produce almost 200 types of products in 14 series in accordance with GB/T 13793-1992, ASTM A500, DIN ...

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Professional ERW steel pipe manufacturers - It has more than 200 varieties