機器
accuracy
alloy
cetner
circular
cog
cogwheel
connection
cutting
drill
engine
engineering
equipment
factory
gear
gearbox
heavy
industrial
industry
iron
lathe
machine teeth
manufacture
mechanical
metal
metalworking
motion
part
parts
pinion
precision
production
rapidsteel
screw
shaft
shiny
spiral
stainless
steel
strength
technology
teeth
thread
tool
tools
toothed
transmission
turning
wheel
work