機器
blue
bucket
calx
canyon
chalk
day
deposit
dig
dirt
earth
earthmover
environment
environmental
equipment
excavator
extract
extraction
get
gravel
heavy
hoist
industrial
industry
landscape
large
limestone
machinery
mine
mineral
mining
mountain
natural
old
open
operate
pile
pit
quarry
rock
shovel
sky
stone
summer
sunny
work