one-way sign

... one-piece firefighting suit 连衣裤消防战斗服 one-way sign 单向通行标志 onoff sprinkler system 开闭式喷水灭火系统 ...

...需遵守停车牌 (stop sign)、交通灯讯号、单行线 (one-way sign) 等交通标志。