機器
activity
arm
backhoe
bucket
build
bulldozer
burrow
construction
construction site
development
dig
digger
digging
dirt
equipment
excavate
excavating
excavation
excavator
gravel
ground
heavy
hole
hydraulic
improvement
industrial
industry
machinery
mood
outdoors
pit
scoop
shovel
site
soil
tractor
trench
vehicle
work
working
yellow