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PCE
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DIFF Subgroup
F25D 21/002

Full Title

Defrosting; Preventing frosting; Removing condensed or defrost water (removing ice or water from heat-exchange apparatus in general F28F17/00; heating arrangements specially adapted for transparent or reflecting areas H05B3/84)

Of 3 combined children, 0 exist in both systems.

3 codes are CPC-only extensions.