99热这里只有精品免费播放,色妞www精品视频,欧美爱爱免费视频,97精品人妻系列无码人妻,精品人人妻人人澡人人爽牛牛

The services of Greentec in civil building divided into two domains: self-clean and noise control. In self-clean area, Photocatalyst will be applied on the surface of building external wall, by its self-clean function. In 2008, photocatalyst technology also been used for protect the residential environment by indoor air cleaning. Greentec accumulated more than 10 years experience in Building HVAC(heating, ventilating and air-conditioning) systems noise control. By completed several noise control projects such as in NPC conference building、State Council office building、capital airport Terminals and Beijing west railway station et al, Greentec has made a prominent contribution to improve Beijing acoustic environment.

The picture shows the nightscape of China national grand theatre. In order to achieve a nearly perfect audio effect, its noise grade in the theatre audience area should be reduced under a rigorous international level. The noise control project of China national grand theatre has been completed by Greentec in 2006, and matched the standard successfully at the same year.