Polymerization installations, namely, melting furnaces for melting polymers to create plastics

Buildings, transportable, of metal; latticework of metal; prefabricated buildings of metal; ladders of metal; metal containers in the shape of a bottle for compressed gas or liquid air; containers of metal for storing acids; containers of metal for storage, and transport; packaging containers of metal; water and liquefied gas tanks of metal for industrial use; [ troughs of metal for mixing mortar; ] containers of metal for liquid fuel; chests of metal; hoppers of metal, non-mechanical; contai...