traction engine
noun [ C ] uk/ˈtræk.ʃən ˌen.dʒɪn/ us/ˈtræk.ʃən ˌen.dʒɪn/
(以蒸汽为动力、旧时尤用于牵引重物的)牵引机车,牵引车
a large, heavy vehicle, operated by steam power, used especially in the past for pulling heavy loads along roads
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