1. Tube forming of household appliance;Ochiai;J. Jpn. Soc. Technol. Plast.,1982
2. The history of tube forming on bicycle industry;Tagaki;J. Jpn. Soc. Technol. Plast.,1982
3. Trend of tubular bending;Takahashi;J. Jpn. Inst. Light Met.,2006
4. Cold bending of boiler tube;Yamatake;J. Jpn. Soc. Technol. Plast.,1969