IS: 3215 - 1991; Engineers' Drawing Instruments - Needle Points - Specification
BIS
IS: 3215 - 1991; Engineers' Drawing Instruments - Needle Points - Specification - New Delhi BIS 1991 - 2p
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IS: 3215 - 1991; Engineers' Drawing Instruments - Needle Points - Specification - New Delhi BIS 1991 - 2p
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