References
- Sorokin , V N and Zubchenko , A S . 1982 . ‘Automation of the process of welding circular joints in heat-exchanging equipment.’ . Svar Proiz , : 15 – 16 . (10)
- Steklov , O I . 1986 . ‘Fundamentals of welding production’ , Moscow : Publ Vysshaya shkola .