F22D 1/18
Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged otherwise than in the boiler furnace, fire tubes, or flue ways and heated indirectly
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Edits on 16 Mar, 2022
Golden AI
Edits on 5 Mar, 2022
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F22D 1/18
Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged otherwise than in the boiler furnace, fire tubes, or flue ways and heated indirectly
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Classification Type
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