DIN 52253 Beiblatt 1:1990-04 Test methods for the determination of the frost resistance; burnt-clay roofing tiles, fair faced clay bricks and clinker bricks; informations
1990DIN 52253 Beiblatt 1:1990-04 Test methods for the determination of the frost resistance; burnt-clay roofing tiles, fair faced clay bricks and clinker bricks; informations