大断面井筒
Large Cross-section shaft
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
扁平特大断面
flat and large span section
扁平特大断面隧道
super-large cross-section tunnel with low height-span ratio
extra-large cross-section and cow flat-ratio tunne
超大断面
extra-large cross section
super big cross section
large cross-section
super-large section
super large section
outsized section
Super section
超大断面隧道
Super section tunnel
tunnel with ultra-large section
Tunnel with super large cross-section
大断面
full section
large cross-sectional area
large span rock
largely-excavated section
high section charmber
large sections
Big Cross-section
large cross
huge break surface
Large profile
large cross-section tunnel
large cross section
heavy section
large-section
big section
large section
large cross-section
large cross sectional area
pretreatment
big cross section
large section roadway
characteristic sections
Section
大断面地下铁路隧道
large cross - section underground railway tunnel
大断面硐室
Large section cavern
large section chamber
large profile underground chamber
大断面公路隧道
Highway Tunnel with Large Cross Section
大断面换装硐室
reloading chamber with large cross-section
大断面黄土隧道
Loess tunnel with large cross-section
Large-cross-section loess tunnels
large-cross-section loess tunnel
Large section loess tunnel
Large-section Loess Tunnel
large cross-section loess tunnel
大断面回采巷道
large section mining gateway