DIFF Subgroup
F22D 1/32 arranged to be heated by steam, e.g. bled from turbines
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Feed-water heaters, e.g. preheaters > arranged to be heated by steam, e.g. bled from turbines
CPC:
Feed-water heaters, i.e. economisers or like preheaters > arranged to be heated by steam, e.g. bled from turbines
Of 2 combined children, 1 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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