英文關鍵字
airport
asphalt
backhoe
break
breaker
building
bulldozer
concrete
construction
crack
crash
crews
crusher
crushing
cut
debris
demolishing
destroy
digging
dirt
dust
equipment
freeway
hammer
heap
heavy
highway
hydraulic
industrial
industry
layers
load
machine
machinery
motorway
pave
pavement
pile
rehabilitation
removal
road
runway
site
technology
track
vehicle
workers
working