DIN 53390
DIN 53390 Testing of glass fibre reinforced plastics; bending test on unidirectional glass fibre reinforced laminated plastics in the form of round bars
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 06/01/1988
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 06/01/1988