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T312br型液力传动装置是现代高速内燃动车组动力传动系统中的部件，在中高速范围内可高效、经济地运行。内置的制动器可满足高速动车组的要求，即无级控制的液力制动器用于持续坡道制动和减速，同时还与轮滑保护系统相结合。传动单元电控装置还提供一些辅助功能，如：对运行参数的诊断和监测，所有的辅助功能都使司机大受裨益。
The T312br hydraulic transmission unit is a component of the powertrain system of a modern high-speed diesel-electric car and can operate efficiently and economically in medium-speed and high-speed ranges. The built-in brakes meet the requirements for high-speed EMUs, ie steplessly controlled hydraulic brakes for continuous ramp braking and deceleration, combined with a skid protection system. The drive electronic control unit also offers a number of auxiliary functions, such as: diagnosis and monitoring of operating parameters, all the auxiliary functions are greatly beneficial to the driver.