英文關鍵字
abrasive
accuracy
background
blade
closeup
electricity
equipment
grind
grinder
grinding
grindstone
hand
handle
hoe
industrial
industry
iron
job
knife
lathe
machine
man
manual
metal
occupation
outdoor
protective
service
sharp
sharpen
sharpener
sharpening
shovel
skill
spin
steel
stone
technology
tool
vintage
water
wheel
whet
whetstone
wooden
work
worker