| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a cylindrical product capable of being joined in a short time and having a superior appearance. <P>SOLUTION: This is a method of manufacturing cylindrical products, wherein a first cylinder 12 has a circular curved region at least in a part of the side face 12a, with an end face of second cylinders 14 fixed to the circular curved region of the first cylinder by resistance welding, and wherein the end face of the second cylinders 14 has a tapered annular tip end, with these tapered annular tip ends fixed to the circular curved region in a ring shape on the side face of the first cylinder by resistance welding. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
