2013DIN EN 295-7:2013-05 Vitrified clay pipe systems for drains and sewers - Part 7: Requirements for pipes and joints for pipe jacking; German version EN 295-7:2013
2013DIN EN 295-7:2013 Vitrified clay pipe systems for drains and sewers - Part 7: Requirements for pipes and joints for pipe jacking; German version EN 295-7:2013