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DE2556439A1
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Ferrite parts strength testing method - uses electromagnetic eddy currents in round or strip shaped parts
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DE2523418A1
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Deep penetration eddy current crack detector - has field extended by supplementary permanent magnet
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DE2439285A1
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Resistance seam welding, esp. of austenitic sheet - using electronic control circuit contg. Hall generator and Schmitt triggers
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DE2313069A1
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Spot welding machine control - by integrated work input and electrode pressure controlling current
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DE2309889A1
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Spot weld quality checking device - comprises an eddy current generating and measuring coil system in weld zone
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DE2222869A1
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Chain link resistance welder control - fitted with hall multipliers
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DE1809287A1
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Automatic metal tube seam welding
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