After 2000, the country's metal-bashers somehow managed to raise their productivity growth by another notch, to 5.1% a year, according to the Bureau of Labour Statistics.

根据劳工统计局的历史资料，2000年之后，美国的冶金企业以某种方式保持年生产率的增长并达到一个新的水平，每年5.1%。

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The filtrating core is made by stainless steel notch metal by enwinding , with high intensity and resistance for corrosion; therefore, it can be used permanently unless it is damaged physically.

滤芯采用不锈钢凹口金属线缠绕而成，其强度高且具有优良的耐腐蚀性。

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By taking the rectangular metal patch on a printed circuit board as the radiation element and by cutting a C-shaped slot in the rectangular patch, a frequency band notch is implemented.

该天线采用印刷电路板上的矩形贴片作为辐射单元，通过在矩形贴片上开一个C形槽来实现陷波功能。

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