機器
background
blade
bolt
closeup
concept
craft
cut
device
emery
equipment
fabrication
form
friction
grind
grinder
grinding
heavy
hone
industrial
industry
iron
knife
knives
machinery
manufacture
manufacturing
metal
power
process
production
profession
professional
sandpaper
sharpen
sharpener
sharpening
steel
stone
table
tool
tradition
traditional
wooden
work
workshop