1977NF X10-602:1977 CENTRIFUGAL,MIXED FLOW AND AXIAL PUMPS. CODE FOR ACCEPTANCE TESTS. CLASS B.
1974NF X10-601:1974 CENTRIFUGAL,MIXED FLOW AND AXIAL PUMPS.CODE FOR ACCEPTANCE TESTS.CLASS C
NF E44-401*NF EN ISO 9906:2012 Rotodynamic pumps - Hydraulic performance acceptance tests - Grades 1, 2 and 3. was changed to LST EN 61347-2-3-2011 Lamp control gear -- Part 2-3: Particular requirements for a.c. and/or d.c. supplied electronic control gear for fluorescent lamps (IEC 61347-2-3:2011).