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Method for manufacturing of axle box assembly of electric measuring instrument
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System for measuring phase-shift angles of current transformers
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Water aerating device
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Electric indicating instrument
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Telegraph key
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Dc voltage calibrator
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Apparatus for recording signals
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Shaper of clock pulses
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Electric-measuring device
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High-ohmic resistance box
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Dc voltage calibrator
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Digital generator with variable signal spectrum
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Line dc electric motor
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