英文關鍵字
activity
aggregate
air
asphalt
asphalting
automatic
back
belt
bitumen
black
blacktopping
cleaning
compactor
contruction
conveyor
covering
debris
demolition
dirt
down
dust
elimination
equipment
falling
focus
forest
garbage
heavy
hydraulic
industrial
industry
job
line
loading
lorry
machine
machinery
maintenance
material
mechanism
motion
movement
moving
old
outdoors
perspective
pieces
preparation
rake
rasped
red
resurface
road
rolling
selective
tarmac
top
transport
transportation
truck
vapor
vapour
working