英文關鍵字
abrasive
angle
artificial
blade
burr
craft
cut
device
edge
emery
equipment
form
german
grind
grinder
grinding
grindstone
heavy
industry
iron
japanese
knife
labor
machinery
man
manufacture
master
measure
metal
people
polish
power
process
production
rude
sandpaper
set
sharpener
sharpening
steel
technology
tool
water
work
workshop