MIL-STD-1621A
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时间:2024-05-10 05:40:38
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MIL-STD-1621A, MILITARY STANDARD: ACOUSTICAL AND VIBRATIONAL STANDARD REFERENCE QUANTITIES (27 AUG 1973) [NO S/S DOCUMENT]., This standard covers reference quantities to be used in reporting of all acoustical and vibrational quantities expressed in terms of levels.
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