機器
abstract
backdrop
background
binding
bond
brown
business
classic
closeup
cogs
cogwheels
concept
conceptual
connect
cooperation
engine
engineering
factory
gearbox
gears
golden
idea
industrial
industry
interlock
mechanical
mechanics
mechanism
metal
motion
motorcycle
orange
precious
precision
rotate
shine
spare parts
steel
success
team
teamwork
technology
teeth
transmission
transmissive
wheel
work
yellow