Qingdao Shuangzi Precision Machinery Co.,Ltd -

Qingdao Shuangzi Precision Machinery Co.,Ltd

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pipe fittings
Specification: ASTM A234 WPB
Detail: Shuangzi Group has passed the ISO9001-2000 quality system certification, and it controls every production process according to the requirements of the quality system request to ensure stable and reliable product quality. It h...


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