http://iz-ulianovska.livejournal.com/ ([identity profile] iz-ulianovska.livejournal.com) wrote in [personal profile] funny_smile 2010-06-29 05:06 pm (UTC)

Да это термин из санитарной гигиены. Предельно Допустимая Концентрация:)))
(32 comments)

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