機器
above
aerial
background
building
coal
construction
development
digger
dirt
earth
energy
environment
equipment
excavating
excavation
excavator
extraction
factory
gravel
heavy
hydraulic
industrial
industry
job
land
landscape
large
machinery
mine
mineral
open
pit
power
production
quarry
rock
sand
scoop
shovel
site
soil
technology
top
tractor
transportation
truck
vehicle
view
work