Home / Standards / GB/T 18631-2002 GB/T 18631-2002 Abolished Textile fibre--North sky light daylighting for classing rooms 纺织纤维分级室的北空昼光采光 Standard Type GBT ICS 59.060.01 CCS W04 Status 废止 Issue Date 2002-01-28 Implementation 2002-07-01 Responsible Dept 市场监管总局 Drafting Unit N/A