英文關鍵字
agricultural
blade
button
circle
closeup
craft
cut
emery
equipment
fabric
fabrication
form
friction
glove
gloves
grind
grinding
heavy
implement
industrial
industry
knife
machine
machinery
manufacture
master
mechanic
metal
power
production
safety
sandpaper
sharpen
sharpener
sharpening
sparkle
sparks
start
steel
stone
switch
table
tool
tradition
turner
wooden
work
worker
workers