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Complex-protection constant current electric power supply system
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Key board of game automatic machine
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Device for determining workability of telegraph apparatus
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Printing device
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Secondary power supply
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Voltage regulator
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Pulse amplifier
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Device for determination of velocity of telegraphic operation and for measurement of telegraphic distortions
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Output switch stage of pulse amplifier
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Bipulsed signal receiver
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Compact switch
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Output key cascade of pulse amplifier
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Low-frequency electric filter
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Multi-channel power supply with protection
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Address signal control device for serial memory
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Linear cyclic code decoder
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Control device of telegraph set
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Stepping electric motor
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Reserve electric power supply device
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Capacitance filter with inductive coupling
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