As used in parts 7011.1900 to 7011.1915, the following words shall have the meanings defined herein.
"Blast furnace" means any furnace used to recover metal from slag.
Brass or bronze.
"Brass or bronze" means any metal alloy containing copper as its predominant constituent, and lesser amounts of zinc, tin, lead, or other metals.
Brass or bronze ingot production plant.
"Brass or bronze ingot production plant" means any facility producing brass or bronze from a copper alloy-bearing scrap material by smelting to the metallic form.
"Electric furnace" means any furnace which uses electricity to produce over 50 percent of the heat required in the production of refined brass or bronze.
"Reverberatory furnace" includes the following types of reverberatory furnaces: stationary, rotating, rocking, and tilting.