亚洲人成网站18禁止中文字幕,国产毛片视频在线看,韩国18禁无码免费网站,国产一级无码视频,偷拍精品视频一区二区三区,国产亚洲成年网址在线观看,国产一区av在线

The Xuhui District government in Shanghai plans to install double-glazed sound-proof windows in schools along noisy streets, according to district officials.

 

The district recently installed the new windows in Nandan Road Primary School, and several more schools will be upgraded in the near future.

 

The district also installed metal blinds that can change positions to allow ventilation while blocking noise. According to tests by the Xuhui Environment Protection Research Institute, when the new windows and metal blinds are used together they can reduce noise by up to 20 decibels.

 

Officials wouldn't say how much the windows cost to install.

 

Noise-related complaints accounted for almost 50 percent of the grievances registered with the city government last year.

 

(Shanghai Daily March 27, 2007)