Полезные Свойства, Перекись водорода!
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![[Колмаков Олег] ЧТО ДОЛЖЕН ЗНАТЬ БУДУЩИЙ ОПЕРАТОР КОТЕЛЬНОЙ ДЛЯ БЕЗОПАСНОЙ РАБОТЫ КОТЛА](https://sun9-51.userapi.com/impg/LVjn-zXYeS1dM4fzqJOB3uJ7ZxbiobhpKcYULQ/JMzAonJ-9YA.jpg?size=320x240&quality=95&keep_aspect_ratio=1&background=000000&sign=43f516bb1f7e105b187ebce49920e330&c_uniq_tag=sRoLHqri7DxWDjV-PhtH1LUGFZzEOh1Lk258Lz5I1Sg&type=video_thumb)
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