St. Technisch Centr. v.d. Keramische Industrie (TCKI)
VELP GLD, NL
EN 772-1 VLP 10 Clay roof tiles Determination of flexural strength; destructive test ANA-KO-17 EN 538 VLP 11 Clay pavers Determination of transverse breaking load and modulus of rupture; destructive test ANA-KO-14 Annex D fro