A trailer was attached to the rear of the truck.
卡车后面挂了一辆拖车。
In the old days, you had to put them in the back of a trailer.
在过去，你需要把它们放到一个拖车的后部才行。
A new brake of trailer is showed here, which is electromagnetic.
本文提出了一种新型拖车制动器，采用电磁制动形式。
A two-shaft trailer is chosen as a specifical object of study.
本文选择双轴挂车为具体研究对象。
A two-shaft trailer is chosen as a specifical object of study.
本文选择双轴挂车为具体研究对象。
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