英文關鍵字
path
asphalt
curb
warning
ground
construction
wind
fenced
industrial
broken
infrastructure
problem
accident
safety
heating
white
red
pedestrian
autumn
repair
barrier
damaged
damage
metal
plastic
underground
obstacle
base
forbidden
city
fence
placed
nobody
laying
industry
preparing
yard
equipment
grass
amendment
reinforcement
area
road
pipe
pipeline
surface
engineering
technology