Several flies kept upsetting the boy who was studying. He was so upset that he upset a cup of water on the desk.
好几只苍蝇一直烦扰这个正在学习的男孩。他心烦意乱，以致翻了桌子上的一杯水。
The present invention provides an upsetting method capable of manufacturing, by a minimum load, an upset article having swelled parts formed in a bent shape.
提供能够以尽可能低的载荷制造鼓出部为弯曲形状的镦锻加工品的镦 锻加工方法。
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