Posted on 02/07/201802/07/2018 by Wiesław Pilch02.07.2018 Blockchain: Zastosowanie w energetyce cz1 https://od.lk/d/ODRfMTgwNTM0OTFf/02.07.2018%20Blochchain%20Zastosowanie%20w%20energetyce%20cz1.mp3