Building Construction
The stone masonry of finely dressed stones laid in cement or lime, is

Random rubble masonry
Coursed rubble masonry
Ashlar masonry
Dry rubble masonry

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Building Construction
Rotary drilling

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

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