CPC Subgroup
F24D 19/08 Arrangements for drainage, venting or aerating (valves for venting or aerating F16K24/00)
Full Title
Details (of water or air heaters F24H9/00; of heat-exchange or heat-transfer apparatus, of general application F28F) > Arrangements for drainage, venting or aerating (valves for venting or aerating F16K24/00)
2 direct subcodes
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