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CZ276997A3
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Data protection method and apparatus for making the same
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Document processing apparatus
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Connection for a unit with approximating or parallel converter
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Arrangements of module for serial communication in local microcomputers nets
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Paralell interface unit
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Programmable controller of finite number of states
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Keyboard circuitry for manual information inlet into electrical systems
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Connexion for safety semiconductor switch
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Device for continuous prcessing ef bio gas
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Circuit for group synchronization of light signalling apparatus controllers
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Electrochemical generator of theelectric current
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Connection for protection against trolleybus electric current accident
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Device for symetrization of the troleybus nets
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Continuous electric network insulating state measuring apparatus
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Device for the control of industrial mechanisms with human attendance
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