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device for kuehlung of metalldampfentladungsapparaten, especially quecksilberdampfstromrichtern, using at least two on the size of the stromrichtergefaesses distributed lueftern
device for kuehlung of metalldampfentladungsapparaten, especially quecksilberdampfstromrichtern, using at least two on the size of the stromrichtergefaesses distributed lueftern