機器
bog
boom
bucket
cabin
chain
clay
control
development
dig
digger
digging
dragline
electronics
engineering
excavation
excavator
extraction
fossil
fuel
gear
ground
heavy
hoist
hydraulic
industrial
industry
land
machinery
mechanical
mine
move
old
pit
production
quarry
quarrying
reclamation
resources
rope
rusty
shovel
swamp
walking
winch
works