Engineering Materials
The charge of the blast furnace consists of

Calcined ore (4 parts), coke (1 part) and limestone (8 parts)
Calcined ore, coke and limestone all in equal parts
Calcined ore (1 part), coke (8 parts) and limestone (4 parts)
Calcined ore (8 parts), coke (4 parts) and limestone (1 part)

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Engineering Materials
Aluminium bronze contains

94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
90% magnesium and 9% aluminium with some copper
10% aluminium and 90% copper
92.5% aluminium, 4% copper, 2% nickel, and 1.5% Mg

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