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 area of voids in masonry units (by paper indentation); German version EN 772-2:1998 + A1:2005— 8 стр.
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.
Multi-burner gas-fired overhead radiant tube heater systems for non-domestic use - Part 2: System E, safety; Amendment A3; German version EN 777-2:1999/A3:2002— 4 стр.
