Paragraph 37
Commodities in ASARCO (American Smelting and Refining Company) shaft furnaces, the deoxidisation of copper swarf and the annealing of copper and copper alloys to provide a reducing atmosphere
Commodities in ASARCO (American Smelting and Refining Company) shaft furnaces, the deoxidisation of copper swarf and the annealing of copper and copper alloys to provide a reducing atmosphere