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ES343638A1
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An electrical indicator measuring device. (Machine-translation by Google Translate, not legally binding)
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FR1497309A
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Limit Detector Dial Indicator
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FR1495277A
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Electrical indicating devices
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GB1161237A
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Improvements in or relating to Indicating Instruments
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FR1493876A
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Device for blocking the movement of the needle of a measuring device
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US3412332A
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Pointer lock for electrical indicating instruments
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US3435341A
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Electrical control meter having a rotor disk with an arcuate segment for interrupting light between a light source and sensor
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