Building Materials
A pug mill is used for

Tempering brick earth
Moulding brick earth
Providing brick earth
Softening brick earth

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Building Materials
In the method of condensation polymerization,

All of these
The reaction proceeds with an evolution of hydrogen chloride
Low-molecular substances are removed from the high molecular substance
The reaction proceeds with an evolution of ammonia

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Building Materials
Veneering means

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

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