機器
activity
aerial
big
building
construction
destruction
development
digging
dump
earth
ecology
environment
equipment
excavation
excavator
extreme
flooded
geology
gravel
great
ground
heap
heavy
industrial
industry
land
landscape
large
limepit
limestone
material
mine
mineral
mining
open
orange
ore
pit
quarry
raw
resource
rock
rubble
sand
stack
stockpile
stone
transportation
work