英文關鍵字
action
air
airoperated
breaker
breaking
business
buster
chipper
compressed
concrete
construction
covering
damage
demolish
demolished
destroy
development
digging
equipment
functioning
hammer
heavy
jackhammer
machinery
operate
operating
pavement
paving
plugger
pneumatic
preparation
puncher
reinforcement
repair
ruined
site
tools
tractor
work