地下管线 meaning in Chinese

underground line
underground utilities
underground utility

Underground utilities management of shanxi aluminum manufacturer
山西铝厂地下管线的管理
Application of converted way in near parallel pipe underground
反演法在探测相邻平行地下管线中的应用
Exploration and surveying of subterranean pipeline based on pda embedded system
的地下管线普查与测量
Application of mapgis processing system in survey of underground pipe
处理系统在地下管线探测中的应用
Underground pipes in your yard ,
在你院子里面的地下管线

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