单行线 single line ; one-way street ; One-way road ; One Way

单线串行接口 DOCI

单行线规则 single direction

单行线标志 axb ; one way sign

单线运行图 train diagram for single track

进行简单线性 Simple Linear

单行线酒吧 JJ PUB

火线单行 live wire single file

单行曲线 unicursal curve

临时单线行车 temporary single-line working