abstract
background
cable
close up
closeup
color
construction
copper
copper wire
cuprum
design
detail
electric
electrical
electrician
electricity
electronics
energy
equipment
expensive
garbage
heap
industrial
industry
manufacturing
material
metal
metallic
metallurgy
nonferrous
pile
power
production
raw
raw material
recycle
recycling
red
resource
scrap
scrap metal
secondary raw materials
shine
shiny
technology
trash
wire