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PCE
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DIFF Subgroup
F22B 21/30

bent in U-loop form

Introduced: September 1968

Full Title

Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically > built-up from water tubes of form other than straight or substantially straight > bent in U-loop form

IPC and CPC are identically structured here. All 1 subcodes exist in both systems.

Child Classifications

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  • F22B 21/32 disposed horizontally in abutting connection with upright headers or rising water mains IPC+CPC Available in IPC and CPC