機器
action
activity
asphalt
blade
cement
circular
closeup
concrete
construction
control
crack
cut
cutter
cutting
danger
diamond
dirty
disc
dust
dusty
engine
equipment
floor
grinder
industrial
industry
instrument
job
machinery
man
noise
outdoor
pavement
person
power
reconstruction
road
saw
sawing
sidewalk
site
slab
stone
street
surface
tool
work
worker
workplace