英文關鍵字
abrasive
accuracy
action
carbide
circle
close
cnc
corundum
detail
details
diamond
disc
disk
engineering
equipment
fabric
factory
foundry
grinder
grinding
grindstone
hand
industrial
industry
iron
machine
machinery
machining
manufacturing
metal
metalwork
metalworking
plant
precision
production
real
sharpening
sparks
spin
spinning
steel
stone
surface
technology
the
time
tool
welding
wheel
work
workshop