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FR2312747A1
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Textile fibre spool drying machine - has rotary mandrels travelling between condenser electrodes at track sides
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GB1097397A
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Improvements in or relating to the protection of workpiece electrodes susceptible to inter-electrode arcing
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DE1213078B
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Electric welding device for pipes, tubes or the like.
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US3393286A
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Induction tube welder with impedor
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GB1046940A
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Improvements relating to high frequency heating apparatus
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CA789151A
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Electric welding apparatus for tubes
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CA898902A
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H.f. heating apparatus
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