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PCE
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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)