機器
accuracy
automobile
automotive
bevel
closeup
cog
cogwheel
component
connection
design
engineering
equipment
gear
gearbox
gearing
gearshift
geometric
industrial
industry
iron
machinery
manufacture
manufacturing
material
mechanical
mechanics
metal
module
movement
object
part
pinion
pitch
power
ratio
rotation
shaft
spare
steel
structure
technology
teeth
tooth
torque
transfer
transmission
transportation
vehicle
work
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