aluminum
backdrop
background
banner
blank
bolts
business
cogs
cogwheel
concept
conceptual
connect
cooperation
copy space
creative
empty
energy
engine
engineering
gearing
gears
gray
group
horizontal
idea
illustration
industrial
industry
interlocked
iron
ironworks
machinery
mechanics
mechanism
metal
metallic
power
presentation
progress
shadow
shape
silver
stainless
steel
teamwork
technology
template
together
wheel
work