機器
activity
asphalt
belt
building
clay
construction
conveyor
diesel
digging
dirt
dirty
drive
driveway
driving
engine
equipment
flat
forest
grader
gravel
ground
heat
heavy
highway
industry
job
lane
loam
machinery
manual
metal
occupation
outdoors
paving
pressure
repairing
road
rolled
roller
site
smooth
soil
steam
steamroller
street
traffic
transportation
truck
vehicle
wheel
wood
work
worker
working
workplace
yellow