The cutting features of composite matrix sawblades with different diamond mixture ratios are studied by production test.

通过生产试验研究了不同金刚石配比复合基圆锯片的切割特性。

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It introduces the test of smelting SiCaBa alloy in calcium carbide furnace, and focuses on the effects of some burden ratios and charging styles to the alloy's composition.

介绍了在电石炉上改炼硅钡钙的试验情况，着重阐述了几种配比及加料方式对合金成分的影响。

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The results of mechanical test show that is bending strength, toughness against impact and void ratios can be improved after the rich iron matris is added with rare earth.

力学性能测试结果表明：添加稀土的富铁胎体及其金刚石复合材料的抗弯强度、 冲击韧性和孔隙度均有明显的改善。

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The professionals use statistical packages and programs such as FactSet, to back-test ratios.

FORBES: The Quant Test

But just by doing that, the close rates in his test area of Texas went from 3.2% close ratios to 7.5% close ratios.

FORBES: Top 100 Lead Response Companies at salesforce.com's Dreamforce 2012