機器
accessibility
belt
blue
construction
conveyer
conveyor
dig
dump
efficiency
environment
equipment
excavation
exploration
generation
geology
gravel
heap
horizon
industrial
industry
land
landscape
machinery
material
mine
mineral
modern
movable
open
outdoor
pile
pit
produce
product
production
quarry
sand
sky
sludge
spreader
stack
stacker
storage
technology
transportation
work