对于各种硬度和材质的样品它可提供良好的尖锐边缘并且保持共面性。
For various hardness and texture of the samples it can provide a good sharp edge and to maintain a total of nature.
摩擦学测试表明渗氮样品不仅摩擦系数大大降低了，而且表面硬度也获得了显著提高。
Tribological tests reveal that the friction coefficients of the nitrided samples are greatly reduced, and the surface hardness is remarkably improved at the same time.
然而挤压装置仅能大体估计样品的新鲜程度，因为测量结果同样还要取决于包装材料的硬度及面包片装填的松散度。
However, the squeezing device gives only an approximation of freshness, since the reading also depends on the stiffness of the wrapping and the looseness with which the bread slices are packed.
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