地下光缆 meaning in Chinese

subterranean cable
underground cable

Physical location and protection of below ground fiber optic cable plant
地下光缆的物理定位和保护
The application of max274 275 in the detecting of the subterranean cables
275在研制地下光缆路由探测仪中的应用
Sectional specification for splice closures for pressurized aerial , buried , and underground fiber optic cables
气密架空埋设地下光缆接线盒的分规范