... Gate Torque motor,steady,low noise,free maintenance 100% duty cycle,heavy duty Automatic fault-detect 5 million MTBF Intelligent Automatic Barrier Gate ... rightward Simple structure, easy installation & maintenance Torque motor,steady,low noise,free maintenance 2mm cold-rolled ... Controller: Intel 80C51 MCU, 40 MHz,controlled silicon motor control4) Spring: multi-spring balance5) Loop detector input ...