機器
aerial
belt
construction
conveyor
dig
disposal
efficiency
environment
equipment
excavation
exploration
facility
futuristic
generate
generation
geology
gravel
heap
industrial
industry
landscape
machinery
material
mine
mineral
movable
outdoor
pile
pit
potash
produce
product
production
quarry
sand
separator
site
sludge
slurry
stack
stacker
storage
technology
transportation
view
waste
work