Shot peening is also improved the stress relaxation ability of copper alloy.

喷丸处理亦能改善铜合金的应力松弛性能。

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And because of that increase in investment, its demand for things like iron and copper shot up and that created additional investment in countries like Peru, Australia and Brazil.

BBC: The year in business: 2012

The price of oil, copper, steel, international shipping--even mud--shot up.

FORBES: Magazine Article