"One slope and three gears" refers to the preventive measures adopted to ensure the safety of rail transportation in coal mines and prevent sports car accidents. Its means include anti-sports car devices and sports car protection devices, and may also include automobile braking. (1) Automatic reset (or linkage) brake is installed in the upper parking lot near the gradient change point. (2) Install the first sports car protection device about one train length under the slope change point. (It is called a buffer in "Coal Mine Safety Regulations"). (3) in the inclined lane, according to the actual working conditions of roadway transportation (roadway slope, series quality, etc. ), sports car protection device is gradually installed. "One slope and three blocks" should also refer to a management method to ensure the safety of rail transit. Pneumatic control box bumper pneumatic bumper bottom-up sports car protection device sports car protection device dumper (light dumper) Three-sided dumper pneumatic * * * vibration sweeper hydraulic dumper hydraulic dumper hydraulic dumper pusher wellhead operating system self-assembled car bumper rocker mining car oiler scraper turbine hydraulic rail bender horizontal planer stemming machine (Taian Norton Mining Equipment Co., Ltd.)