英文關鍵字
agricultural
blade
button
circle
closeup
craft
cut
device
emery
equipment
fabrication
form
friction
gloves
grind
grinder
grinding
heavy
hoe
implement
industrial
industry
knife
machine
machinery
manufacture
manufacturing
master
mechanic
metal
process
production
professional
safety
sandpaper
sharpen
sharpener
sharpening
sparks
steel
switch
table
tool
tradition
turner
wheel
wooden
worker
workers
workshop