Main prod. Group survey
deu
fra
esp
41
Environmental, waste disposal and recycling technology
Water treatment, waste water treatment plants and sludge conditioning plants
Clarification plants for drinking, industrial and waste water
1721.11
Ion exchangers
1721.15
Filtration plants
1721.17
Ultrafiltration plants
1721.18
Biofiltration plants
1721.21
Microfiltration installations
1721.22
Nanofiltration plants
1721.24
Reverse osmosis plants
1721.27
Stripping installations for the groundwater sanitation
1721.31
Stripping installations for sewage clarification
1721.34
Waste water lifting plants
1721.35
Pressure increase installations