機器
action
activity
angle
asphalt
blade
block
build
builder
building
cement
circle
circular
concrete
construction
cut
cutter
cutting
danger
diamond
dirty
disc
dust
dusty
engineering
equipment
grinder
grinding
hand
industrial
industry
infrastructure
instrument
job
machinery
manual
material
pavement
power
reconstruction
road
saw
sawing
site
slab
stone
tool
work
worker
workplace