即产生压缩性缩短
That is, compressibility is shortened
以上为机器翻译结果，长、整句建议使用 人工翻译 。
与伸长相反的是镦粗，即产生压缩性缩短。例如，棒料的直径可以通过加热和轴向锤击而增大。
The opposite of elongation is upsetting, which produces compressive shortening. For example, the diameter of a bar can be increased by heating and hammering axially.
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