aluminum
bar
bunch
bundle
circle
concrete
construction
corrosion
cylinder
diminishing
durable
equipment
factory
ferrous
girder
group
heap
heavy
industrial
industry
iron
joist
manufacture
material
metal
metallic
objects
old
part
pile
pipe
pipeline
plant
plate
profile
rack
rod
rough
rust
sheaf
shelf
stack
steel
stock
storage
storehouse
technological
technology
tube
warehouse