英文關鍵字
abrasive
action
blade
circle
circular
closeup
concept
construction
craft
craftsman
cutter
development
disk
equipment
fire
grinding
grindstone
hand
handwork
hard
industry
iron
job
labourer
light
machine
machining
manual
manufacturing
metal
mill
milling
millstone
noise
repairing
repairman
safety
sharp
sharpen
slomo
spark
tools
wheel