This standard specifies letter symbols for quantities used in fluid mechanics. It is a supplement to DIN 1304 part 1 for this field and is to be used together with that standard.
DIN 1304-5:1989 history
1989DIN 1304-5:1989-09 Letter symbols for physical quantities; symbols to be used for fluid mechanics
1989DIN 1304-5:1989 Letter symbols for physical quantities; symbols to be used for fluid mechanics