RE:RE:Update on tunneling at Petra Arcbyt and Petra are one and the same, and have been shown to be the company that have funded Pyrogenesis for the development of plasma torches specifically for tunneling. Arcbyt a California company has advertised for engineering jobs in Montreal.
https://stockhouse.com/companies/bullboard/t.pyr/pyrogenesis-canada-inc?postid=32680185