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Three phase controller using sequence switching
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Three-phase control circuit for sequentially energizing the field windings of a three-phase stepper motor
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Method and device for converting analog values into digital values
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Detector for combustible gas
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Method for calibrating microanalytical instruments and apparatus therefor
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Valve control mechanism
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Stepper motor circuits
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Outer seal
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Analog to digital converter
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A differential pressure measuring gauge
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Maximum or minimum gauge pointer indicator
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Differential pressure meter
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A pressure responsive device and vented seal therefor
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Adjustment for valve closure of differential pressure responsive mechanism
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Closure holder
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Vented seal
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Exterior seal
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