?单叶平转桥

... double-leaf swing bridge 双叶平转桥 single-leaf swing bridge 单叶平转桥 double-leaf bascule bridge 双叶竖旋桥 ...

?单叶平旋桥

... pontoon swing bridge 浮旋桥; 开合式浮桥 rim bearing swing bridge 环承式平旋桥 single-leaf swing bridge 单叶平旋桥; 单叶平转桥 ...