機器
bonding
clockwork
close
cog
cog wheels
cogs
cogwheel
concept
connect
connection
engineering
equipment
gear
gearbox
gearing
gears
idea
industrial
industry
interlock
interlocked
interlocking
machinery
macro
mechanical
mechanics
mechanism
metal
nobody
objects
part
parts
precision
steel
symbol
teamwork
teeth
three
together
up
wheel
wheels