DIN EN ISO 9905/A1:2011-11 Technical specifications for centrifugal pumps - Class I - Amendment 1 (ISO 9905:1994/AMD 1:2011); German version EN ISO 9905:1997/A1:2011
2011DIN EN ISO 9905/A1:2011-11 Technical specifications for centrifugal pumps - Class I - Amendment 1 (ISO 9905:1994/AMD 1:2011); German version EN ISO 9905:1997/A1:2011
2011DIN EN ISO 9905/A1:2011 Technical specifications for centrifugal pumps - Class I - Amendment 1 (ISO 9905:1994/AMD 1:2011); German version EN ISO 9905:1997/A1:2011