traction-engine

n vehicle, powered by steam or diesel, formerly used for pulling heavy loads （以蒸汽或柴油为动力的）牵引车（旧时用以拖重物的）.

tracer, tracery, trachea, tracheotomy, trachoma, tracing, tracing-paper, track, track and field, track down, track events, track out, track record, track suit, tracked, tracking station, tract, tractability, tractable, traction, tractor, tractor-trailer, trad, trade, trade gap, trade mark, trade name, trade price, trade secret, trade wind, trade-in, trade-off, trade-unionism, trade-unionist, trademark, trader, Trades Union Congress (abbr 缩写 TUC), tradesman, trading, trading estate,