英文關鍵字
arm
breaker
bucket
bulldozer
caterpillar
compression
concrete
construction
cracking
crush
crusher
demolish
destroying
devastation
digger
digging
dozer
drill
dust
duty
earth
equipment
excavation
excavator
focus
hammer
heavy
hydraulic
impact
industrial
industry
jack
jackhammer
ladle
machine
machinery
mining
mover
operating
pneumatic
pounding
power
pressure
road
rock
rocky
selective
shatter
shovel
site
stone
work
worksite