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Electric welding-machine.
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Electric welding.
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Electric welding-machine.
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Electric welding-machine.
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Work-table for electric welding-machines.
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Control means for electric switches.
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Electric welding-machine.
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Electric welding-machine.
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Electric welding-machine.
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Electric welding-machine.
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Process of electrical welding.
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Electric welding-machine.
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Electric welding apparatus.
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