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SU40820A1
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Селекторное устройство
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Means for delivering an intermittent electrical current
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BE370898A
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(c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html)
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Electromechanically-controlled switch and remote-control signaling and telephone system
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Устройство дл вещани по проводам
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Телефонное устройство
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BE345833A
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