drawbar

详细解释:n. (列车间的)挂钩

英语解释：

名词 drawbar:

a strong metal bar bearing a hook to attach something to be pulled

详细解释：

draw.bar

n.（名词）
A bar across the rear of a tractor for hitching machinery.
联接杆：拖拉机后部牵引机械的横梁
A railroad coupler.
挂钩：连接火车车厢的挂钩