DIN 51178 : 2009被替代
VITREOUS AND PORCELAIN ENAMELS - INSIDE AND OUTSIDE ENAMELLED VALVES AND PRESSURE PIPE FITTINGS FOR UNTREATED AND POTABLE WATER SUPPLY - QUALITY REQUIREMENTS AND TESTING
出版：German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻
