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求助ASTM标准E2611-09
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求助ASTM标准E2611-09
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findpass
2012-10-18 16:12
ASTM E2611-09: 2009, Standard Test Method for Measurement of Normal Incidence Sound Tranission of Acoustical Material Based on the Transfer Matrix Method
findpass
2012-10-19 09:48
继续求
findpass
2012-10-20 13:43
继续求继续求
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求助ASTM标准E2611-09
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