機器
abrasive
carving
circle
cnc
cnc machine
complex
cut gear
cutter
cutting
drive
engineer
equipment
factory
gadget
gear manufacturing
gears
heavy
industrial
industry
iron
lathe
lubrication
machinery
machining
manufacturing
mechanical
mechanical engineering
metal
metalwork
metalworking
milling
moving
part
power
precision
process
production
screw
shaft
sharpening
shiny
stainless steel quality
steel
technology
tool
tooth
turning
work
worm