機器
abstract
art
background
black
business
circle
clockwork
cog
cogwheel
collaborate
collaboration
concept
connection
cooperation
copy space
creative
design
different sizes
dirty
element
engine
engineering
equipment
factory
gear
grimy
grunge
idea
illustration
industrial
industry
invent
machinery
mechanic
mechanical
mechanism
metal
part
pattern
round
steel
symbol
table
teamwork
technical
technology
teeth
wheel
work