Building Construction
Rotary drilling

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

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Building Construction
Single Flemish bond consists of

English bond facing and double Flemish bond backing in each course
Double Flemish bond facing and English bond backing in each course
Double Flemish bond facing and header bond backing in each course
Stretcher bond facing and double Flemish bond backing in each course

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