| 摘要 |
Provided is a friction stir welding apparatus which performs friction stir welding on a work piece by bringing a tool into contact with a surface of the work piece and rotating and moving the tool about the axis thereof, the friction stir welding apparatus including: a hot air and cool air separating unit which separates a supplied gas into hot air hotter than the gas and cool air cooler than the gas and ejects the hot and cool air, wherein at least one of the hot air and the cool air is supplied to the surface of the work piece.
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