Home / Standards / GB/T 21780-2008 GB/T 21780-2008 Active Partical size analysis - Sedimentation analysis in the gravitational field - Pipette method 粒度分析 重力场中沉降分析 吸液管法 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 国家标准委