CHINA RAILWAY 12 BUREAU GROUP

Sichuan Guo Tong concrete products Co., Ltd.

CHINA RAILWAY 2 BUREAU GROUP

ZIBO LONGQUAN PIPING ENGINEERING CO.,TLD.

SHANGHAI GIVIL ENGINEERING GROUP CO.,LTD OF CREC

Wuhan double strength cement products Co., Ltd.

CHINA COAL NO.03 CONSTRUCTION (GROUP)

Beijing River mountain water diversion pipe industry Co., Ltd.

CHINA CONSTRUCTION FIFTH ENGINEERING DIVISION CORP.,LTD.

WUXI HUAYI PIPE MANUFACTURING CO.,TLD.

CHINA CONSTRUCTION SCIENCE & TECHNOLOGY GROUP CO.,LTD.

Hebei source and water six Bureau of China, Zhejiang and Korea construction and Management Co., Ltd.

CHINA COMMUNICATIONS CONSTRUCTION COMPANY LIMITED 

POWERCHINA SHANDONG PIPELINE ENGINEERING CO.,TLD.

Construction and installation of Shanghai force

Nanjing iron tunnel rail transit supporting Engineering Co., Ltd.

Baotou Qingjian cement products Co., Ltd.

Nanjing City Metro Industrial Machinery Co., Ltd.

SHANGHAI MUNICIPAL CONSTRUCTION CO.,LTD.

Nanning Jingu cement products Co., Ltd.

SHANGHAI MECHANIZED CONSTRUCTION GROUP CO.,LTD.

Guizhou Fu Ren Concrete Construction Co., Ltd.

Liaocheng Shengyuan building materials Co., Ltd.

WEIHAI QIDE NEW MATERIALS CO.,LTD.

Zhenjiang four pipe building component Co., Ltd.

Zhenjiang four pipe building component Co., Ltd.

BEIJING SHENLIN MUNICIPAL ENGINEERING CO.LTD.

Three Gorges Changyao tube Corridor Construction Co., Ltd.

Xiangyang Dafa cement products Co., Ltd.

Zhangzhou Changshan building materials Co., Ltd.

YANG ZHOU PILE CO.LTD.

Tangshan Yonghong cement products Co., Ltd.

Zhongshan Jianhua pipe pile Co., Ltd.

Xi'an new goose cement products Co., Ltd.

Xichang force God industry and Trade Co., Ltd.

Baoding thousand autumn Pipe Industry Co., Ltd.

DEYANG ENDERLE CEMENT PRODUCTS

JI'NAN YOUGSHUN PIPELINE CO.LTD.

Nantong Rong Xin Pipe Industry Co., Ltd.

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