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Method of producing case insulation of electric machine coils
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Source of seismic signals
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Apparatus for moulding workpieces
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Method and apparatus for firing the hearth blocks of aluminium electrolyzer
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A.c. voltage regulator
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Device for protecting synchronous electric motor against overheating
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Seismic signal source
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Method of automatic regulation of reactive load of induction motor group
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Pulse duration selector
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Method of milling material in the mill
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Digital frequency discriminator
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Device for applying tape insulation of section of electric machines
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Apparatus for protecting three-phase electric motor against abnormal duty
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Method of stabilizing electrical conditions of aluminium electrolyzer
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Method of controlling the grinding in tumbling barrels
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Multichannel device for programmed control of reactive loads of industrial plants
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Method of determining locations of deteriorations of insulation in electrolyzer series
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Detachable electric connection
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Furnace arrangement
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Digital phase-frequency comparator
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