| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce quality of breaking through due to a pinhole of a welding joint part of a sealed container, and also to reduce a welding spatter scattering in the sealed container. <P>SOLUTION: Protruded strips linearly extending along an axis in a fitting direction are circumferentially disposed at plural portions on one of an inner surface of an enlarged diameter part formed at one end of one cylinder, or an outer surface of the other cylinder inserted to the enlarged diameter part. In addition, the other cylinder is inserted to the enlarged diameter part to come into contact with the protruded strip and the outer surface of the other cylinder, or with the protruded strip and the inner surface of the enlarged diameter part, and thereby joining the end of the enlarged diameter part and the outer surface of the other cylinder by the arc welding. <P>COPYRIGHT: (C)2012,JPO&INPIT |
