##. REF. Hydroforming [] B. Alzahrani,G. Ngaile (2016) Preliminary Investigation of the Process Capabilities of Hydroforging, Materials, Vol.9. ---- ## REF. Orbital forming [] 許進忠,余征諴 (2010) 不銹鋼管凸緣擺輾成形製程技術, 精密機械與製造科技期刊, Vol.1, pp.62-67. ---- ##. REF. Spinning:
[] W. Homberg, D. Hornjak,C. Beerwald (2010) Manufacturing of Complex Functional Graded Workpieceswith the Friction -Spinning Process, International Journal of Material Forming, Vol.3, pp.943-946. --------------------------------------------------