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Qingdao Kingway Industries Co., Ltd.
HUASHENG PIPELINE TECHNOLOGY CO., LTD.
Qingdao Bestflow Industrial Co., Ltd.
Hopewell Building Materials Co., Ltd.
Taizhou Zhuoxin Plastics Co., Ltd.
Hebei Shengtian Pipe-Fitting Group Co., Ltd.
Cangzhou Heli Machinery Co., Ltd.
Ningbo HeQi Pipe Co., Ltd.
Wenzhou Yuzheng Valve Co., Ltd.
Ningbo Ace Machinery Technology Co., Ltd.
Ningbo Hengsheng Machinery Co., Ltd.
Tianjin Golden Hugeline Co., Ltd.
Qingdao Hexin Machinery Co., Ltd.