manhole covers的意思|示意
井盖
manhole covers相关短语
1、 Sewage manhole covers 污水井盖
2、 Ballast manhole covers 压载井盖
3、 Manhole covers of metal 金属检修孔盖
4、 adjustable manhole covers 可调式井框盖
5、 watertight manhole covers 水密人孔盖
6、 manholes and manhole covers 沙井和井盖
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