Rules for protecting wire communications devices against the interference of DC electric railroads.
Правила защиты устройств проводной связи от влияния тяговой сети электрических железных дорог постоянного тока. |
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GOST 21.404-85SPDS. Process automation. Standard symbols and … |
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GD Постановление N 539 от 12.10.2004Resolution N 539 of October 12, 2004. On the … |
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MinEdu 3477Schedule of Occupations Requiring Professional … |