英文關鍵字
concrete
mixer
truck
line
symbol
outline
crushed
embankment
strengthening
slopes
drainage
repair
linear
contour
background
lined
online
roller
technology
level
laser
slab
closed
worker
tractor
vehicle
wheel
brick
mark
marking
monochrome
icon
motion
graphic
animation
pictogram
hd
animated
item
sign
black