機器
backhoe
bucket
build
building
bulldozer
business
caterpillar
clay
construction
diesel
dig
digger
digging
dirt
dozer
dump
dust
earth
earthmover
equipment
excavate
excavation
excavator
foundation
grader
gravel
ground
growth
heavy
hydraulic
industrial
industry
investment
lorry
pipe
power
rock
rocks
scoop
shovel
site
soil
track
tractor
transport
transportation
trench
truck
work