機器
activity
belt
black
business
coal
cobblestone
concrete
construction
conveyor
crushed
dig
dump
earth
energy
engineering
equipment
extraction
factory
heap
heat
hole
industrial
industry
large
loading
machinery
manufacturing
material
metal
mine
miner
mineral
mountain
outside
pebble
piece
pit
pouring
quarry
rock
stack
steel
stone
technology
transportation
work
works