Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Zur Kuehlung des Brennraumes eines Dampfkessels dienende, an den Kesselwasserumlauf angeschlossene, verschieden stark beanspruchte Heizflaechengruppen mit Nebenumlauf innerhalb der Kuehlrohrgruppen