大断面巷道
large section tunnel
Drift with large cross section area
roadway with large sections
large-scale roadway
large section roadway
大断面巷道掘进
large section tunnel advance
大断面岩巷
Large cross section rock roadway
浅埋大断面大跨度
sallow large section and span
浅埋大断面大跨度连拱隧道
Shallow-covered Large Cross-section and Large-span Double-arch Tunnel
特大断面大跨度隧道
ultra large-span tunnel with super-large cross-sec
ultra large-span tunnel with super-large cross-section
扁宽断面巷道
roadways of flat and wide cross-section
巷道断面形状
cross-section shape of roadway
破碎软岩巷道
incompact and fractured soft-rock roadway
软岩巷道
roadways of soft rock
soft roadway
soft rock roadways
soft rock tunnel
drift in soft rock
soft rock gateway
Soft rock gallery
mine soft rock roadway
Roadway within Soft Rock
tunnel with soft wallrock
soft rock roadway
soft-rock roadway
soft rock excavation
soft rock laneway
soft rock entry
软岩巷道围岩变形
deformation of the soft rock around tunne ls
软岩巷道修复
soft rock drift renovation
软岩巷道支护
soft rock roadway support