DIN EN 305:1997-07 Heat exchangers - Definitions of performance of heat exchangers and the general test procedure for establishing performance of all heat exchangers; German version EN 305:1997
1997DIN EN 305:1997-07 Heat exchangers - Definitions of performance of heat exchangers and the general test procedure for establishing performance of all heat exchangers; German version EN 305:1997
1997DIN EN 305:1997 Heat exchangers - Definitions of performance of heat exchangers and the general test procedure for establishing performance of all heat exchangers; German version EN 305:1997