沿空掘巷
- 网络gob-side entry driving; roadway driving along goaf; roadway driving along next goaf
沿空掘巷沿空掘巷
gob-side entry driving
矿山术语 - 日的日志 -... ... 沿空巷道 gob-side entry 沿空掘巷 gob-side entry driving 沿空留巷 gob-side entry retaining ...
roadway driving along goaf
综放沿空掘巷,place along free... ... ) roadway driving along goaf 沿空掘巷 ) roadway driving along next goaf 沿空掘巷 ...
roadway driving along next goaf
综放沿空掘巷,place along free... ... ) roadway driving along goaf 沿空掘巷 ) roadway driving along next goaf 沿空掘巷 ...