GB/T 9966.3-2020天然石材试验方法第3部分:吸水率、体积密度、真密度、真气孔率试验标准
英文:Test methods for natural stone—Part 3:Determination of water absorption,bulk density,true density and true porosity G...
英文:Test methods for natural stone—Part 3:Determination of water absorption,bulk density,true density and true porosity G...