2018CJ/T 51-2018 Standard test method for urban sewage water quality
2004CJ/T 51-2004 Methods for the examination of municipal sewage
1970CJ/T 74-1999 Determination of Chloride in Municipal Sewage by Silver Method
CJ/T 74-1999 Determination of Chloride in Municipal Sewage by Silver Method was changed to CJ/T 51-2004 Methods for the examination of municipal sewage.