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Qingdao Winport Import and Export Co., Ltd.
CNBM International Corporation
Shandong Hengrui Tong New Materials Engineering Co., Ltd.
Shandong Yadai New Materials Co., Ltd.
Taian Cadeer Geosynthetics Co., Ltd.
Shandong Dageng Project Material Co., Ltd.
Qingdao Haisan New Energy Co., Ltd.
Laiwu Trustworthy Import and Export Co., Ltd.
Tianjin Zhengda General Steel Pipe Technology Co.,Ltd