英语标志牌用英语怎么翻译?

1、 warning board
Warning 报警,警告...warning board 标志牌,警告牌...Warning buzzer 蜂鸣器（倒车用）
2.signboard
Signal valve 信号阀...signboard 标志牌...signboard illumination 标志牌照明
3.marking board
交通工程学 Traffic Engineering...标志牌 marking board...交通标志标线 traffic marking line
4.denoter
标志牌：denote