Home / Standards / GB/T 6909-2008 GB/T 6909-2008 Abolished Analysis of water used in boiler and cooling system - Determination of hardness 锅炉用水和冷却水分析方法 硬度的测定 Standard Type GBT ICS 71.040.40 CCS G76 Status 废止 Issue Date 2008-04-01 Implementation 2008-09-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit 中国石油和化学工业联合会