DIN EN 13508-2 Berichtigung 1:2007 建筑物外部排水和排污系统条件.第2部分:目视检验编码系统.DIN EN 13508-2-2003技术勘误
Conditions of drain and sewer systems outside buildings - Part 2: Visual inspection coding system; German version EN 13508-2:2003, Corrigenda to DIN EN 13508-2:2003-09; German version EN 13508-2:2003/AC:2007