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Aus Aco Wiki
Drainage channels were already available on the market. ANRIN, for example, produced a 1 m long asbestos cement channel made of pipe half-shells, with glued-on side walls made of asbestos sheets. Arno Ebsen approached ACO engineer Dieter Brink in Rendsburg. Brink developed the original idea further, for example, by turning the pipe half-shells into pipe third-shells, with glued-on side walls with a length of 1.2 m.
