| 331492 |
Superalloys, nonferrous based, made from purchased metals or scrap |
| 331492 |
Tin recovering from scrap and/or alloying purchased metals |
| 331492 |
Tungsten carbide powder made by metallurgical process |
| 331492 |
Zinc dust reclaiming |
| 331492 |
Zinc recovering from scrap and/or alloying purchased metals |
| 331511 |
Cast iron brake shoes, railroad, manufacturing |
| 331511 |
Cast iron pipe and pipe fittings manufacturing |
| 331511 |
Cast iron railroad car wheels manufacturing |
| 331511 |
Castings, compacted graphite iron, unfinished, manufacturing |
| 331511 |
Castings, malleable iron, unfinished, manufacturing |