Hellow guys, Welcome to my website, and you are watching Николай Янчук "Как с помощью лазера находить дефекты железнодорожных путей". and this vIdeo is uploaded by Science Slam Russia at 2019-11-27T14:15:05-08:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.
