CPC Subgroup
F01P 9/04 by simultaneous or alternative use of direct air-cooling and liquid cooling (F01P9/02 takes precedence)
Full Title
Cooling having pertinent characteristics not provided for in, or of interest apart from, groups F01P1/00 - F01P7/00 (profiting from waste heat of combustion-engine cooling F02G5/00) > by simultaneous or alternative use of direct air-cooling and liquid cooling (F01P9/02 takes precedence)