Building Materials
Three basic raw materials which are needed in large quantities for production of steel are

Iron ore, carbon and lime stone
Iron ore, coal and sulphur
Iron ore, carbon and sulphur
Iron ore, coal and lime stone

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Building Materials
Veneering means

Thick layer of superior wood glued to inferior wood
Carving out designs on timber planks
Chemically treating timber planks
Thin layer of superior wood glued to inferior wood

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