Home / Standards / GB/T 27991-2011 GB/T 27991-2011 Active Fundamental technical requirements for sediment measurement and particle size analysis instrument in open channel 河流泥沙测验及颗粒分析仪器基本技术条件 Standard Type GBT ICS 07.060 CCS N93 Status 现行 Issue Date 2011-12-30 Implementation 2012-06-01 Responsible Dept 水利部 Drafting Unit 水利部