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