A tunnel boring machine is a machine that constructs subway tunnels.
Keywords
excavation,
shield,
subway,
tunnel,
mole,
worm,
segment,
lining,
underground,
slurry,
drive,
shaft,
launching,
conveyer belt,
muck,
pampered,
geology,
ground,
face,
pressure,
advance,
ring,
erection,
propulsion,
jack,
tail,
skin,
grout,
monitoring,
guidance,
laser,
operator,
maintenance,
logistic,
assembly,
disassembly,
transportation,
diameter,
urban,
station