機器
activity
adult
boss
bucket
build
builder
bulldozer
business
businessman
construction
control
dig
digger
earth
earthmover
equipment
excavation
excavator
ground
helmet
industrial
industry
job
loader
machinery
man
mover
operator
person
power
professional
sand
scoop
shovel
sign
site
soil
success
suit
tie
track
tractor
transport
under construction
vehicle
website
work
worker