Home / Standards / GB/T 21865-2008 GB/T 21865-2008 Active Standard test methods for determining average grain size using semiautomatic and automatic image analysis 用半自动和自动图象分析法测量平均粒度的标准测试方法 Standard Type GBT ICS N/A CCS A80 Status 现行 Issue Date 2008-05-12 Implementation 2008-09-01 Responsible Dept 国家标准委 Drafting Unit N/A