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