Russian standards PDF
Semiconductor frequency converters. General technical requirements
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Analogous transformers measuring current, voltage, capacity, frequency, resistance. General specifications
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Apparatus for ultrasonic therapeutics. General specifications
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D.c. circuit-breakers with rapid auto-reclosing. General technical requirements
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Section electrical insulating fiber-glass reinforced plastics. General specifications
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Basic environmental testing procedures. Part 2. Tests. Tests B: Dry heat
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