Trucks may be either straight (all axles attached to the frame) or articulated (two or more frames connected by coupling s); large articulated trucks consist of a towing tractor and a connected semitrailer.

貨車有直的(所有的輪軸都聯(lián)結(jié)在一個框架上)或連軸的(由一個連軸節(jié)來將幾個框架連接在一起)的車廂91九色偷情自拍视频，大型的連軸貨車包括一個拖車和一個相連的半拖車久久久精品久久久。

Trucks may be either straight (all axles attached to the frame) or articulate d (two or more frames connected by couplings); large articulate d trucks consist of a towing tractor and a connected semitrailer.

貨車有直的(所有的輪軸都聯(lián)結(jié)在一個框架上)或連軸的(由一個連軸節(jié)來將幾個框架連接在一起)的車廂欧美成年网，大型的連軸貨車包括一個拖車和一個相連的半拖車性爱一级毛片。

The paper outlines development history of structure and power transmission system for aircraft towing tractor.

論述了飛機牽引車的結(jié)構(gòu)和動力傳動系統(tǒng)的發(fā)展歷程。