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国家西部大开发战略的实施，“十五”期间大量基础设施建设的启动，不仅对载重卡车从数量上有更大的需求，而且对车辆性能和质量也有了更高的要求。但目前国内载重卡车产品受到公路法规的限制，公路或公矿两用载重卡车的载质量在15 t以上时就需采用3轴支承，而达到25 t级时，则
The implementation of the strategy of developing the western part of the country and the launching of a large number of infrastructure projects during the 10th Five-year Plan not only make greater demands on the number of trucks, but also have higher requirements on vehicle performance and quality. However, the current domestic truckloads are subject to the laws and regulations of the highway. When the mass of road or highway dual-purpose truck is above 15t, the bearing needs to be supported by 3-axle, and when it reaches 25t,