機器
amber
backhoe
big
building
bulldozer
capacity
cast
clay
coal
construction
cut
cutting
development
dig
digger
digging
dirt
dredge
dredger
dust
earth
engineering
equipment
excavate
excavated
excavation
excavator
extraction
factory
gigantic
grab
gravel
haul
hauling
industry
iron
ladle
large
machinery
metal
mining
mover
ore
pit
quarry
russia
shovel
technology
work