lotus999 发表于 2014-12-3 09:33:12

JIS A 1419-2:2000

JIS A 1419-2:2000 Acoustics-Rating of sound insulation in buildings and of buildingelements-Part 2:Floor impact sound insulation

admin 发表于 2014-12-3 09:48:25

谢谢您的分享,金币已奖励
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