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Adjustable ac-to-ac voltage converter
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Device for adjusting technical parameters by preset program
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Sand mixture for manufacturing investment moulds
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Moulding sand for making investment moulds
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Polishing paste
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Device for checking three-phase network phase alternation
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Comparison device
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Device for checking phase alternation in three-phase network
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Apparatus for magnetic abrasive working
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Method of producing chain armour web
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Automatic machine for producing chain-armour web
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Device for protecting ac equipment from voltage drop
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Apparatus for pressing-in pattern composition
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Device for protecting electric from one or more phase disapperance
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Charging apparatus for feeding loose materials into melting furnace crucible
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Apparatus for producing wire rings
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Production method using closed wire links
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Composition for chemical dulling of the surface of copper and copper alloys
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Voltage monitoring device
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Signalling device
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