DIN 19583-2
DIN 19583-2 Gully tops 500 × 500 for road gullies - class C 250 and D 400 - Part 2: Particulars
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 11/01/1996
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 11/01/1996