|
| 2720 | Recovering silver from used photographic film or X-ray plates | |
| 2720 | Refining aluminum, primary | |
| 2720 | Refining copper, secondary (i.e., of purchased metal or scrap) | |
| 2720 | Refining non-ferrous metals (except aluminum), primary | |
| 2720 | Refining non-ferrous metals (except aluminum, copper), primary | |
| 2720 | Rhenium smelting and primary refining | |
| 2720 | Rod, copper and copper alloy, made from purchased metal or scrap | |
| 2720 | Rod, made by extruding purchased aluminum | |
| 2720 | Rod, made by rolling purchased aluminum | |
| 2720 | Rod, made from purchased aluminum | |
| 2720 | Rod, made from purchased non-ferrous (except aluminum, copper) metal or scrap | |
| 2720 | Rolling, drawing and extruding purchased non-ferrous metal (except aluminum, copper) | |
| 2720 | Scrap and dross aluminum, refining into ingot | |
| 2720 | Secondary refining (i.e, of purchased metal and scrap), precious metals | |
| 2720 | Secondary refining (i.e., of purchased metal and scrap), non-ferrous metal (except aluminum, copper) | |
| 2720 | Selenium bar, sheet, strip and tubing, made from purchased metal or scrap | |
| 2720 | Selenium smelting and primary refining | |
| 2720 | Selenium, recovering from scrap and/or alloying purchased metals | |
| 2720 | Sheet, aluminum, made by flat rolling purchased aluminum | |
| 2720 | Sheet, copper and copper alloy, made from purchased metal or scrap | |
| 2720 | Silver and silver alloy bar, sheet, strip and tubing, made from purchased metal or scrap | |
| 2720 | Silver beating (i.e., to manufacture leaf and foil) | |
| 2720 | Silver foil and leaf, made from purchased foil | |
| 2720 | Silver foil, made by rolling purchased metal or scrap | |
| 2720 | Silver rolling, drawing or extruding, purchased metal or scrap | |
| 2720 | Silver smelting and primary refining | |
| 2720 | Silver, recovering from scrap and/or alloying purchased metals | |
| 2720 | Silver, recovering from used photographic film or X-ray plates | |
| 2720 | Slab, primary aluminum, manufacturing | |
| 2720 | Smelters, non-ferrous metals (except aluminum) | |
| 2720 | Smelting of non-ferrous metals (except aluminum), primary | |
| 2720 | Smelting of non-ferrous metals (except aluminum, copper), primary | |
| 2720 | Solder wire, non-ferrous metal (except aluminum, copper), made from purchased metal or scrap | |
| 2720 | Strip, aluminum, made from purchased aluminum | |
| 2720 | Strip, copper and copper alloy, made from purchased metal or scrap | |
| 2720 | Strip, non-ferrous metal (except aluminum, copper), made from purchased metal or scrap | |
| 2720 | Structural shapes, made from purchased aluminum | |
| 2720 | Superalloys, non-ferrous based, made from purchased metals or scrap | |
| 2720 | Tantalum smelting and primary refining | |
| 2720 | Tellurium smelting and primary refining | |
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