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Qingdao Kaijie Heavy Industry Machinery Co., Ltd.
Guangxi Huihuang Langjie Environmental & Tech Co., Ltd.
Weifang Better Heavy Machinery Science and Technology Co., Ltd.
Shandong Better Environmental Protection Technology Co., Ltd.
CHONGQING ZANYO ELECTROMECHANICAL AND MACHINERY CO., LTD.
Liaoning Hanzheng Environmental Protection Equipment Engineering Co., Ltd.
Qingdao Guangneng Rubbers & Plastics Chemical Co., Ltd.
Qingdao Olympia Heat Energy Equipment Co., Ltd.