operated by push rods and rocker arms from a camshaft controlled the feed to the huge cylinders, and just like all large, slow moving machines they are still in perfect condition even after forty years of service. "What would happen," asked Jürgen Zbikowski, a com- pressed air specialist from Bochum and a KAESER distribu- tor, "if compressed air was used instead of superheated steam?" And that's why two KAESER HSD 760 compressors were installed

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