Explanatory notes
… assigned to them : (a) Refined copper Metal containing at least 99.85 % by weight of copper; or … Be, Co, Fe, Mn, Ni, Si. (b) Copper alloys Metallic substances other than unrefined copper in which … of springs and woven wire gauze for filters, screens, etc. (3) Copper‑nickel‑zinc base alloys ( nickel silvers ) …Legal note
… assigned to them : (a) Refined copper Metal containing at least 99.85 % by weight of copper; or … Be, Co, Fe, Mn, Ni, Si. (b) Copper alloys Metallic substances other than unrefined copper in which … de‑sulphurising agents or for similar uses in the metallurgy of non‑ferrous metals. However, copper phosphide …