機器
accuracy
ball
ballbearings
bearing
bearings
bright
chrome
circle
clockworks
cog
cogwheels
connection
energy
engine
engineering
engineeringpart
engineers
equipment
gears
gearwheels
industrialequipment
industrialpart
industry
industrytool
machinepart
mechanical
mechanicalequipment
mechanics
mechanism
metal
metallic
metalteeth
motion
nobody
pinions
power
precision
progress
ring
stainlesssteel
steel
teamwork
technology
titanium
transmission
turning
wheel