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US3176197A
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Devices for testing the carrying out of switching operations in synchronised relay groups
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US3170096A
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Electric circuits with groups of relays actuated by current impulses
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GB992546A
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Improvements in devices for testing the carrying out of switching operations in synchronised relay groups
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GB987405A
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Improvements in or relating to electric circuits with groups of relays actuated by current impulses
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Electrical calculating machine with operational groups of switching elements
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Electrical calculation circuit
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Electromagnetic device
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CA555288A
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Electromagnetic device
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CA610375A
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Electric calculating machine
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CA682336A
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Devices for testing the carrying out of switching operations in synchronised relay groups
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CA615298A
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Switching device
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CA724793A
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Current impulse operated relaying circuits
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