英文關鍵字
asphalt
construction
equipment
machinery
repair
road
street
worker
machine
maintenance
paving
protective
work
industrial
industry
people
job
pavement
reconstruction
transportation
background
bitumen
clothes
dirt
heavy
highway
technology
roadworks
boots
clothing
apply
crew
dirty
gear
hard
hazardous
improvements
layer
man
person
planer
project
rehabilitation
renovation
roadway
safety
seal