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Bauunternehmen Siegfried Sommer Inh.: Dietrich Sommer
Qualified Pipeline Construction Company DVGW-GW 301
Qualified Pipeline Construction Company DVGW - GW 302
DVGW GW 301:
Group W3: pe
Water pipelines for operating pressures ≤ 16 bar and nominal diameters ≤ DN 300, made of: PE