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Ningbo HeQi Pipe Co., Ltd.
Qingdao Bestflow Industrial Co., Ltd.
Qingdao Kingway Industries Co., Ltd.
Taizhou Zhuoxin Plastics Co., Ltd.
Tianjin Golden Hugeline Co., Ltd.
Qingdao Hexin Machinery Co., Ltd.
Hopewell Building Materials Co., Ltd.
YUYAO BEISHUO HARDWARE CO., LTD.
HUASHENG PIPELINE TECHNOLOGY CO., LTD.