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