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2. Rotational-friction welding;Begg;Eng. Technol.,1981
3. Selection of optimum conditions for the friction welding of high-speed steel R6m5 to carbon steel 45;Dobrovidov;Weld. Prod.,1975
4. Frictional behavior of mild steel of friction welding;Duffin;Wear,1973
5. Recent industrial developments in friction welding;Ellis;Weld. J.,1976