英文關鍵字
adult
asphalt
background
cement
city
color
concrete
construction
employee
equipment
green
ground
hand
industrial
industry
infrastructure
job
labor
laborer
line
maintenance
man
marking
new
occupation
outdoor
outside
paint
painter
parking
paving
people
profession
red
repair
road
roadworks
safety
sign
spray
street
surface
town
traffic
urban
way
white
work
worker
working