A man sat in the cab attached to the trailer vehicle. 一個人坐在拖車的駕駛室中。
Tubes are generally mounted on truck trailer chassis, railroad car beds, or placed at stationary locations when large amounts of helium are needed. 管道一般是安裝在拖車底盤或有軌車底座上，或者當需要大量氦時放置在固定位置。
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