上QQ阅读APP看本书，新人免费读10天
设备和账号都新为新人
Announcement of Ministry of Housing and Urban-Rural Development of the People's Republic of China
No.608
Announcement on Issuing the National Standard of Technical code for public address system engineering
Technical code for public address system engineering has been approved as a national standard with a serial number of GB 50526-2010，and will be implemented on December 1，2010.Articles（items）3.2.5（1 and 2），3.5.6，3.5.7，3.6.7（1），4.2.4 and 4.2.5 are mandatory ones and must be implemented strictly.
Authorized by the Research Institute of Standards and Norms of Ministry of Housing and Urban-Rural Development of the People's Republic of China，this code is published and distributed by China Planning Press.
Ministry of Housing and Urban-Rural Development of the People's Republic of China
May 31，2010