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关注：1
2013-05-23 12:21
求翻译：As noise levels increase, particularly in urban settings, people crave the calming effects of a quiet environment. The Our Wallsystem can be designed to meet your project's specific acoustical needs; the polystyrene and concrete assembly means less outside noise gets in. With Sound Transmission Class (STC) ratings of 5是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
As noise levels increase, particularly in urban settings, people crave the calming effects of a quiet environment. The Our Wallsystem can be designed to meet your project's specific acoustical needs; the polystyrene and concrete assembly means less outside noise gets in. With Sound Transmission Class (STC) ratings of 5
问题补充： |
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
