
Ductile iron products for sewage applications
出版:International Organization for Standardization

專家解讀視頻
NFA 89 420:1977 - Similar
KS B ISO 7186:2005 - Identical
GB/T 26081-2010 - Modified
KS B ISO 7186:2013 - Identical
NFA 49 420:1979 - Similar
KS D 4323:2014 - Identical