GB986913A
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Improvements relating to voltage control devices
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GB1023331A
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Improvements in or relating to the control of electric motor driven pumps
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GB958231A
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Improvements in or relating to speed control of alternating current motors
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US3014173A
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Electrical control systems
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GB960213A
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Improvements in or relating to voltage control devices
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GB960211A
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Improvements in or relating to voltage control devices
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GB960212A
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Improvements in or relating to voltage control devices
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GB894000A
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Improvements in or relating to voltage regulators
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GB985311A
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Improvements in or relating to systems for controlling the speed of alternating current motors
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GB964692A
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Improvements in voltage control apparatus
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GB895530A
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Improvements in or relating to voltage regulators
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GB898037A
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Improvements in intermittent reversing drives
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GB952056A
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Improvements in or relating to the control of regulators
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GB896162A
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Improvements in the control of regulators
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GB894014A
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Improvements in electrical furnaces
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GB897515A
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Improvements in or relating to electric regulating apparatus
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GB918422A
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Improvements in or relating to electrical regulating apparatus
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GB851004A
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Improvements in or relating to voltage regulators
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GB907508A
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Improvements in or relating to electric regulating apparatus
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GB881522A
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Improvements in devices for protecting electrical apparatus
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