IS: 2222-1991; Specification for burnt clay perforated building bricks
BUREAU OF INDIAN STANDARDS
IS: 2222-1991; Specification for burnt clay perforated building bricks - NEW DELHI BIS 1991 - 2p - With amendment No.1-1992 .
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IS: 2222-1991; Specification for burnt clay perforated building bricks - NEW DELHI BIS 1991 - 2p - With amendment No.1-1992 .
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