| 摘要 |
PROBLEM TO BE SOLVED: To provide a butt-welding method with which low straining can be achieved while stabilizing quality of a welded product. SOLUTION: This butt-welding method is performed with which after tack- welding supports 11 for reducing the strain at the welding portion in a thin sheet 1, the butt-welding is applied to thin sheet 1 and the welded deformation is prevented, the welded strain is restrained and the quality is stabilized, and thus, the low straining can be obtained.
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