T.JK1-D(50)型车辆减速器是以压缩空气为动力源的浮轨重力式车辆减速器，是驼峰编组站目的制动位的主要调速设备，用于精确调整溜放车辆的速度，实现安全连挂。它包括T.JK1-D50型和T.JK1-D60 型两种型号，分别适用于 50kg/m 和 60kg/m 钢轨的直线段，满足自动化编组作业要求。可单台使用，也可两台串联使用。

   T.JK1-D(50) vehicle speed reducer uses compressed air as power source and is a floating rail gravity-type reducer, and is the main speed control equipment for target braking position of railway hump marshaling station, it is used for precise adjustment of humping speed of the vehicle, and ensuring hanging safety. It includes two models, T.JK1-D50 and T.J T.JK1-D60, which are suitable for the straight sections of 50kg/m and 60kg/m rails respectively and meet the requirements of automatic marshaling operations. They can be used separately or two in series.