Methods of test for masonry units - Part 2: Determination of percentage area of voids in masonry units (by paper indentation); German version EN 772-2:1998 + A1:2005— 8 стр.
Specification for masonry units - Part 3: Aggregate concrete masonry units (Dense and light-weight aggregates); German version EN 771-3:2003 + A1:2005— 36 стр.
Methods of test for masonry units - Part 2: Determination of percentage of voids in aggregate concrete masonry units (by paper indentation); German version EN 772-2:1998— 4 стр.
Methods of test for masonry units - Part 2: Determination of percentage of voids in aggregate concrete masonry units (by paper indentation); German version EN 772-2:1998— 4 стр.