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Method of and tool for making a spring
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Tool for cutting or turning
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Method of making a heat exchanging element
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Process of making a heat exchanging element
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Method of making a heat exchange element
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Process of making reinforced tubes or pipes
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Method of and apparatus for making heat exchanging elements
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Method of making heat exchangers
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Counterboring tool
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Heat exchanger element
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Method of securing metal fins to tubes or cylinders
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Grinding machine
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CA375083A
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Heat exchanging element
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