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重庆西南车辆制造厂生产的铁马XC4190／4×2牵引车，采用康明斯NTC-350型发动机，厂内自主开发的STB-160型带超速挡变速器，最高时速可达106km。该车改进较大的部位有：将原有双层复台大梁改为单层局部加强大梁；顶置式空调改为内置式空调；采用双层玻璃钢保险杠；制动系统加装
The Chongqing Iron Horse XC4190 / 4 × 2 tractor produced by Chongqing Southwest Vehicle Manufacturing Plant adopts the Cummins NTC-350 engine and the STB-160 with overdrive transmission independently developed by the factory, with the maximum speed of 106km / h. The car to improve the larger parts are: the original double-deck complex beam to a single local reinforcement beam; overhead air-conditioning to built-in air-conditioning; double glass fiber reinforced plastic bumper; brake system installation