英文關鍵字
bulldozer
city
cleanup
closeup
concrete
construction
cracked
crawler
crushed
destruction
devastation
dirt
driving
earthmover
excavator
gravel
gripping
ground
industrial
industry
job
machine
maintenance
moves
moving
outdoor
pits
push
removes
repair
scoop
small
soil
technical
tool
tractor
transportation
undercarriage
urban
work
worker
works