英文關鍵字
activity
asphalt
asphalting
bitumen
bridge
bulldozer
city
compactor
concrete
construction
detour
engineering
equipment
excavator
ground
heavy
highway
industrial
industry
interchange
laying
loader
macadam
machine
machinery
maintenance
modern
new
pavement
paver
paving
pressure
repair
road
roller
street
summer
sunny
tractor
transportation
truck
vehicle
vibration
weather
work