165 часть 2 к экзамену по электробезопасности 4-я группа до 1000 вольт
2-Я ЧАСТЬ МАТЕРИАЛА ДЛЯ САМОПОДГОТОВКИ К ЭКЗАМЕНУ В Ростехнадзоре на 4-ю группу по электробезопасности до 1000 Вольт.
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