Laboratory glassware; tightness test of conical joints, spherical joints and stopcocksVerrerie de laboratoire; essais d'étanchéité pour les joints coniques, les joints sphériques et les robinets
DIN 12256:1977 history
1970DIN 12256:2022-08 Laboratory glassware; tightness test of conical joints, spherical joints and stopcocks
1970DIN 12256 E:2021-12 Laboratory glassware; tightness test of conical joints, spherical joints and stopcocks
1977DIN 12256:1977 Laboratory glassware; tightness test of conical joints, spherical joints and stopcocks