DIN 12702
DIN 12702 Laboratory glassware; volumetric glassware for gas analysis, gas burettes, azotometers, eudiometers, nitrometers
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 10/01/1978
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 10/01/1978