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shaft construction
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JPG 300 DPI
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Author:
dreamstime
License:
buy for Personal Use & Commercial
File Type:
JPG
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access
adit
alluvial
and
blast
bore
boring
builder
building
circular
connection
construction
crane
deep
deepen
down
drainage
drill
drinking
energy
excavation
fall
hydropower
infrastructure
lift
mining
mountain
pipe
pipeline
portal
power
profile
project
rock
round
seepage
shaft
shape
sinter
sky
soil
solid
stable
structure
support
surface
tube
tunnel
tunneling
tunnelling
underground
vertical
water