英文關鍵字
automated
automatics
automation
blade
business
chip
circle
complex
control
cut
cutter
detail
device
disc
edge
engineering
equipment
factory
groove
hard
heavy
industrial
industry
iron
knife
lathe
machine
machining
manufacturing
mechanical
metal
metallurgy
metalworking
mill
milling
power
powerful
production
rig
rotation
shavings
speed
steel
technology
tool
turning
work
worker