Канал: ruhahn

Indium metal -The Russian Hahn David's channel, товарищи!

Indium metal -The Russian Hahn David's channel, товарищи!

Beryllium oxide - The Russian Hahn David's channel

Beryllium oxide - The Russian Hahn David's channel

Ra-226 - The Russian Hahn David's channel

Ra-226 - The Russian Hahn David's channel

Dosimeter ДП-5Б and Sr-90 -The Russian Hahn David's channel

Dosimeter ДП-5Б and Sr-90 -The Russian Hahn David's channel