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Electricity metering (a.c.). Tariff and load control. Part 21. Particular requirements for time switches

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Electricity metering equipment AC. Acceptance inspection. Part 11. General acceptance inspection methods

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Graded tea-leaf. Specifications

Norma vydána dne 1.4.1970

Safety of machinery. Functional safety of safety-related electrical, electronic and programmable electronic control systems

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Coarse tea-leaf. Specifications

Norma vydána dne 1.3.1976

Audio/video, information and communication technology equipment. Environmentally conscious design

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Sound signalling devices for household and similar purposes

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