英文關鍵字
activity
asphalt
asphalting
bitumen
construction
coveralls
drive
equipment
finisher
gravel
heavy
hopper
industrial
industry
interstate
laborer
lane
machine
machinery
objects
occupation
pave
pavement
paver
paving
renewal
repair
repairs
road
roll
steamroller
street
tar
tracked
transportation
truck
unit
vehicle
vibration
vibrator
vibroroller
work