機器
background
binding
business
car
cog
cogs
cogwheel
concept
connect
connection
design
engine
engineering
gear
gearbox
gears
grease
industrial
industry
inside
interlock
lubricants
machinery
macro
mechanical
mechanics
mechanism
metal
metallic
motion
part
parts
power
precision
set
steel
teamwork
technology
teeth
transmission
wheel
wheels
work