英文關鍵字
activity
asphalt
asphalting
balance
big
bitumen
building
compactor
construction
drudge
equipment
finisher
heavy
hopper
industrial
industry
machine
machinery
metal
occupation
pave
pavement
paver
paving
repair
repairs
road
roll
site
spreading
steam
street
tar
tracked
transportation
truck
unit
vehicle
vibration
vibrator
work
worker