IS: 1885 (Part III/Sec 6)- 967:Electrotechnical Vocabulary Part 3 Acoustics Section 6 Acoustical Instruments

IS: 1885 (Part III/Sec 6)- 967:Electrotechnical Vocabulary Part 3 Acoustics Section 6 Acoustical Instruments - New Delhi BIS 1967 - 7p

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