機器
builder
building
cement
concrete
construction
crack
destroy
destruction of concrete
dirty
drill
drilling
dusty
electric
equipment
floor
gray
hammer
hammer drill
heavy
hole
hydraulic
industrial
industry
iron
jackhammer
machinery
master
material
noisy
old
pavement
paving
pneumatic
pounding
power
repair
rock
rough
shovel
sidewalk
stone
stones
strong
surface
tool
vehicle
wall
work
worker