alloy
aluminum
blue
cast
casted
crane
crowded
dump
ecology
factory
foundry
grey
heap
horizontal
industrial
iron
junk
lading
loading
many
material
metal
metallic
multitude
nobody
outdoors
pig
pile
port
produce
product
production
raw
recovery
recycle
recycling
recycling center
rusted
shipment
sky
stack
steel
stock
store
stuff
sunny
yard
yellow