For truck with trailer or special vehicle for mining operations, the standard usage life is8 years. 带拖挂的载货汽车、矿山作业专用车使用8年。
III, IV and V of the paper talking on the special vehicle on status, problems and causes analysis and optimization of special vehicle company objectives and operations management process analysis and described in detail. 第三、四、五章主要针对专用汽车公司的现状、问题和原因以及专用汽车公司运营管理优化的目标和过程进行了详细的分析和阐述。