Huajin Group Has Obtained 4 Patents

Date:2021 -10 -18

Recently, 4 utility model patents of China Coal Huajin Energy Group Limited has been authorized by the State Intellectual Property Office including “An Adaptive Dynamic Hole Sealing System , A Basic Miners' Safety Lamp Based on High Precision Personnel Positioning, A Coal Volume Scanning Device Installation Structure of the Scraper Conveyor and A Basic Safety Double Power Supply Double Circuit Lighting Control Device for Mine Flameproof.