驾驶室但是没人的卡车；用来拖拉大型拖车和有蓬货车。
A truck having a cab and no body, used for pulling large vehicles such as vans or trailers.
地区总监运输公的老板兼扶轮社员合作，请他捐出一辆大型拖车。
DG Susan Cook partnered with Rotarian Paul Hammond, owner of Muskoka Transport, who donated a huge trailer.
介绍大批量生产大型拖车用球墨铸铁连接器的生产条件、铸造工艺、 熔炼工艺。
The production conditions, foundry method and melting process for mass production of nodular iron couplers used for large trucks were introduced.
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