Sewer Survey Services - Inspection Channel Network 2026 Refurbishment - Main Channels, Connection Lines And Shafts. Duration 01.2026 - 12.2026. Framework Contract Inspection Of Channels, Connection Lines And Shafts (For Renovation Planning) Optical Inspection Of The Wastewater Ducts And Shafts According To Din En 13508-2 2011 And Isybau Xml -2024 (Bfr -Baufachliche Guideline Wastewater) Quantities: 150 Hours Of Channel And 50 Hours Of Shafts
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