Description
Class B63J : AUXILIARIES ON VESSELS
Subclass 2/10: Arrangements of ventilation, heating, cooling, or air-conditioning (for vehicles in general B60H; ventilating for cleaning tanks B63B 57/04; for underwater vessels, e.g. submarines, B63G 8/36) Ventilation; Air-conditioning Ventilating-shafts; Air-scoops (for port-holes B63B 19/04)