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