機器
backhoe
builder
building
bulldozer
business
collar
construction
dredge
drive
driver
earthmover
engine
engineering
equipment
excavation
excavator
exploitation
hardhat
heavy
helmet
industrial
industry
job
loader
machinery
man
mechanic
mechanical
motor
occupation
one
operator
person
portrait
positive
professional
safety
shovel
side
site
smile
tractor
trade
vehicle
view
work
worker
workwear