Laboratory ware made from fused quartz and fused silica; T-bore stopcocks made from fused quartz Appareillage de laboratoire en quartz ou silce; robinets à voies en T en quartz
DIN 12543:1979 history
1979DIN 12543:1979-05 Laboratory ware made from fused quartz and fused silica; T-bore stopcocks made from fused quartz
1979DIN 12543:1979 Laboratory ware made from fused quartz and fused silica; T-bore stopcocks made from fused quartz