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Method of making heat exchangers
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Method of raising spines
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Machine for raising spines
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Machine for raising spines from metal stock
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Heating means
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Machine for raising spines
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Heat exchange elements
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Combined heating and cooking stove
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Method of making heat exchangers
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Method of producing spines on elements
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Heat exchange element and method of making the same
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Machine for raising metal spines
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Cylindrical stock spine raising machine
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Spine production on elements
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Surface spine raising machine
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Heat exchange element
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Combined heating and cooking stove
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