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CPC Subgroup
F22B 37/06

Flue or fire tubes; Accessories therefor, e.g. fire-tube inserts

Full Title

Component parts or details of steam boilers > applicable to more than one kind or type of steam boiler > Flue or fire tubes; Accessories therefor, e.g. fire-tube inserts

1 direct subcode

Child Classifications

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  • F22B 37/08 Fittings preventing burning-off of the tube edges