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US1744062A
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Electrical welding machine
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Electric welding machine
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Electrical welding machine
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Electric flash welding or heating machine
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Electrical welding machine
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Electric transformer
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Method of electrical welding
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Method of electric resistance welding
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Electric resistance welding
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Method of electrically welding in series
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Method of electric welding
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Electric welding apparatus.
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Method of electric welding and articles produced thereby.
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