DIN EN 14982:2011 Plastics piping and ducting systems - Thermoplastics shafts or risers for inspection chambers and manholes - Determination of ring stiffness; German version EN 14982:2006+A1:2010
2011DIN EN 14982:2011 Plastics piping and ducting systems - Thermoplastics shafts or risers for inspection chambers and manholes - Determination of ring stiffness; German version EN 14982:2006+A1:2010
2006DIN EN 14982:2006 Plastics piping and ducting systems - Thermoplastics shafts or risers for inspection chambers and manholes - Determination of ring stiffness; English version of DIN EN 14982:2006-12