DIN 38404-5-1984 德国检验水、废水和污泥的标准方法.第5部分:物理和物理化学特性(C 组).pH 值测定 (C 5)
German standard methods for examination of water, waste water and sludge; physical and physico-chemical characteristics (group C); determination of pH value (C5)
German standard methods for the examination of water, waste water and sludge; physical and physico-chemical parameters (group C); determination of the pH-value (C 5)Méthodes normalisées allemandes pour l'analyse des eaux, des eaux rési-duaires et des bou