double leaf bascule bridge是什么意思

用法例句

Single sliding plug door and double leaves sliding door are the representatives of automatic door system of ur ban rail vehicles.

单翼塞拉门和双翼对开门是城市轨道车辆自动门系统的典型结构,文章对其工作原理、结构性能、控制方式等方面进行了阐述。