EN 771-1:2003 砌筑块材规范.第1部分:粘土砌块.
EN 771-1:2003 Specification for masonry units - Part 1 : clay masonry units.
EN771-1:2003/A1:2005 砌筑块材规范.第1部分:粘土砌块.
EN771-1:2003/A1:2005 Specification for masonry units - Part 1 : clay masonry units.
EN 771-1:2003 砌筑块材规范.第1部分:粘土砌块.
EN 771-1:2003 Specification for masonry units - Part 1 : clay masonry units.
EN771-1:2003/A1:2005 砌筑块材规范.第1部分:粘土砌块.
EN771-1:2003/A1:2005 Specification for masonry units - Part 1 : clay masonry units.