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PCE
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CPC Subgroup
F02C 7/105

of the rotary type (rotary heat exchangers per se F28D)

Full Title

Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants (controlling F02C9/00) > Heating air supply before combustion, e.g. by exhaust gases > by means of regenerative heat-exchangers > of the rotary type (rotary heat exchangers per se F28D)