Sch 2 para 4
Production and processing of metals (a) installations for the production of pig iron or steel (primary or secondary fusion) including continuous casting; (b) installations for the processing of ferrous metals: (i) hot-rolling mills; (ii) smitheries with hammers; (iii) application of protective fused metal coats; (c) ferrous metal foundries; (d) installations for the smelting, including the alloyage, of non-ferrous metals, excluding precious metals, including recovered products (refining, foundry casting etc.); (e) installations for surface treatment of metals and plastic materials using an electrolytic or chemical process; (f) manufacture and assembly of motor vehicles and manufacture of motor-vehicle engines; (g) shipyards; (h) installations for the construction and repair of aircraft; (i) manufacture of railway equipment; (j) swaging by explosives; (k) installations for the roasting and sintering of metallic ores.