ASTM E2611 -09 標準一則
ASTM E2611-09 Standard Test Method for Measurement of Normal Incidence Sound Transmission of Acoustical Materials Based on the Transfer Matrix Methodhttp://bbs.infoeach.com/thread-28408-1-1.html 已上传 admin 发表于 2013-7-25 12:31 static/image/common/back.gif
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同求,感谢好心人啊~~~~ 好贵啊,怎么要10个金币,没金币怎么办?
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