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1
中华人民共和国国家标准 GB/T16405-1996 eqv ISO11691:1995 声学 管道消声器无气流状态下插入损失测量 实验室简易法=Acoustics-Measurement of insertion loss of ducted silencers without flow-Laboratory survey method
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Language:
chinese
File:
PDF, 6.41 MB
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