Plastics piping and ducting systems - Thermoplastics shafts or risers for inspection chambers and manholes - Determination of ring stiffness; German version EN 14982:2006— 12 стр.
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— 16 стр.
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— 16 стр.