Beijing Lixin Dehua Technology Co., LTD obtained GB/T19001-2016/ISO9001:2015 friction torque limiter r&d, production and service;  Certificate of sales and service of mechanical equipment, certificate of relevant occupational health and safety management system activities of GB/T45001-2020/ISO45001:2018 and certificate of relevant environmental management activities of GB/T24001-2016/ISO14001:2015.