Protection circuits from dangerous voltages and currents arising at lines of wire broadcasting. General requirements and rules
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Weak-current electromagnetic relays
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Unified system for design documentation. Graphic designations in diagrams. Commutational field elements of commutational systems
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Channels and links of primary trunk network within all-union automatic communication system. Electric parameters and methods of measurement
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Control unit of switching communication. Terms and definitions
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Master proofs of newspaper pages for transmission. Technical requirements
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Facsimile copies of newspaper pages. Technical requirements
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Protection of wire communication equipment and personnel from electromagnetic fields influence. Measurement methods
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Protection of telecommunication and installations and personnel against lightning
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Railway telecommunications. Safety requirement control methods
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Electric communication equipment. Supply voltages and methods of measurement
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Line communication sets. Protection circuits from dangerous voltages and currents arisen at lines. Specifications
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