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Weifang Better Heavy Machinery Science and Technology Co., Ltd.
Guangxi Huihuang Langjie Environmental & Tech Co., Ltd.
Liaoning Hanzheng Environmental Protection Equipment Engineering Co., Ltd.
Shandong Better Environmental Protection Technology Co., Ltd.
Qingdao Kaijie Heavy Industry Machinery Co., Ltd.
Qingdao Olympia Heat Energy Equipment Co., Ltd.
Shenzhen Lianxin Testing Equipment Co., Ltd.