MIXING PLANT -Tower system made by Krupp, built in 1969 -Control engineering, originally from Pfister Waagen Augsburg -Current control from Dorner Electronic – Dorner Control -Mixer THZ 3000 (Teka) year of manufacture 1980 MIXING PLANT -Tower complex Manufacturer Krupp, Year of production 1969 -Control construction Manufacturer originally Comp. Pfister Waagen -Control Dorner Electronic - Dorner Control -Mixer THZ 3000 (Teka) Year of production 1980