The experiment result shows that the spacing of onion rings, which is the most prominent features of most friction stir welds, decreases with the distance of onion ring to centerline increasing .
结果表明：焊接接头横截面宏观结构特征表现为焊核区的“洋葱环”和热-机械影响区的塑性流线变形，洋葱环的环间距随着距焊缝中心距离的增大而减小；
The next time the novelist rings the bell I will not stir though the meeting-house burn down.
下一回，小说家再敲钟，哪怕那公共会场烧成了平地，也休想我动弹一下。
The next time the novelist rings the bell I will not stir though the meeting-house burn down.
下一回，小说家再敲钟，哪怕那公共会场烧成了平地，也休想我动弹一下。
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