| 摘要 |
PCT No. PCT/GB95/02426 Sec. 371 Date May 30, 1997 Sec. 102(e) Date May 30, 1997 PCT Filed Oct. 13, 1995 PCT Pub. No. WO96/11757 PCT Pub. Date Apr. 25, 1996A method of forming a closed-end vessel by backward extrusion comprises providing an extrusion billet having a front surface with an axial recess and a body of an extrudable material positioned in the recess. Backward extrusion results in the formation of a closed-ended vessel, for example a pressurized gas cylinder, composed of the material of the extrusion billet with a weld bonded inner surface lining of the extrudable material. |
