英文關鍵字
abrasive
accuracy
background
black
carbide
closeup
cnc
cooling
cutter
cutting
drill
engineering
equipment
factory
grinder
grinding
heavy
hole
industrial
industry
instruments
internal
iron
lathe
machine
machinery
machining
manufacture
manufacturing
mechanical
metal
metallic
metalwork
metalworking
milling
operation
part
power
precision
process
production
steel
technology
tool
turning
water
wheel
work
workshop