Building Materials
Minimum thickness of wall where single Flemish bond can be used is

One and a half bricks thick
Two bricks thick
Half brick thick
One brick thick

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Building Materials
Asbestos

Is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3)
All of these
Contains iron oxide and alumina
Is a natural fibrous mineral substance

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