Building Construction
The piece of a brick cut along the centre of width in such a way that its length is equal to that of full brick, is called

King closer
Queen closer
Half brick
Bevelled closer

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Building Construction
Rotary drilling

Hinders the ground water observations and permeability test
Is not suitable for deposits containing very coarse gravel
Is not economical for holes of less than 10 cm
All listed here

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