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