Home / Standards / GBT 2441.7-2010 GBT 2441.7-2010 Determination of urea — Part 7: Particle size — Sieving method 尿素的测定方法 第7部分:粒度 筛分法 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A