manhole cover的意思|示意
井盖；升降口盖；圆盘状平的东西
manhole cover相关短语
1、 cast iron manhole cover 铸铁人孔盖板
2、 portable manhole cover 便携式人孔盖
3、 hinged manhole cover 铰链式人孔盖
4、 tight manhole cover 紧密窑井盖,检查井密盖
5、 Illuminated Manhole Cover 安全井盖
6、 flush manhole cover 平置式人孔盖,平板式人孔盖
7、 raised manhole cover 升高人孔盖
8、 manhole cover and flames 检查井盖