短语词组短语tofc trailer on flat car 平板集装箱拖车;平板车装运载箱拖车trailer on flat car train 平装装运的货柜挂车列车Piggyback trailer on flat car 背负式集装箱运输trailer -on-flat-car 挂车驮运;铁路挂车平车 返回 trailer on flat car