coal cars是什么意思

用法例句

Application and Development of Railway Coal Car;

铁路运煤车辆的运用与发展

The fair use for trackless underground coal vehicle;

煤矿井下无轨胶轮运煤车的合理使用

This paper discusses important function of the back wheel auxiliary drive of storage battery coal_carrying car and its design calculation of hydraulic system.

论述了蓄电池式运煤车后轮辅助驱动的重要功能 ,并介绍了其液压系统的设计计