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