Hellow guys, Welcome to my website, and you are watching Мастер-класс по профессии "Лаборант химического анализа" (ГБПОУ МГОК) 12 мая 2020 года. and this vIdeo is uploaded by Марина Валерьевна Другина at 2020-05-13T05:13:53-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.