Home / Standards / GB/T 22231-2008 GB/T 22231-2008 Active Particle size distribution/fibre length and diameter distributions 颗粒物粒度分布/纤维长度和直径分布 Standard Type GBT ICS N/A CCS A80 Status 现行 Issue Date 2008-06-19 Implementation 2009-02-01 Responsible Dept 国家标准委 Drafting Unit N/A