Home / Standards / GB/T 21785-2008 GB/T 21785-2008 Active Laboratory glassware - Pyknometers 实验室玻璃器皿 密度计 Standard Type GBT ICS N/A CCS A80 Status Active Issue Date 2008-05-12 Implementation 2008-09-01 Centralized Committee 国家标准委 Issuing Authority 国家标准委