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2. Effect of the diameter of U-forming punch on the deformation process in forming of tube;Tozawa;J. JSTP,1972
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4. Analysis of deformation process in forming of tube for elastic, work-hardening materials;Kawada;J. JSTP,1975
5. Effects of the diameter of U-forming punch on the forming of tube;Kawada;J. JSTP,1977