By virtue of modern metallograph analyse technology, the size of grain, hardness and residual stress of bevel gear by closed-die cold forging is studied.

借助现代冶金分析技术对闭塞冷锻行星齿轮的晶粒尺寸、硬度变化和残余应力分布规律进行了研究。

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The grain hardness of wheat, reflecting character of endosperm texture, is one of the most important determinants of milling, baking and end-use quality.

小麦籽粒硬度是胚乳质地的反映，它是国际通用小麦分类指标之一，与磨粉品质、食品加工品质关系密切。

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Wheat grain hardness is one of the main characteristics that determine the quality, the end-use and international trade through directly affecting both the milling and bread-making qualities.

小麦籽粒硬度是小麦的重要表型性状之一，它直接影响小麦的磨粉品质和烘烤品质，是决定小麦品质优劣、最终用途和小麦国际贸易的重要指标之一。

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But while the glued paper is said to have a wood-like hardness, the arrangement of the layered paper grain will require special consideration for certain design layouts (this can affect other types of 3-D printers as well).

CNN: Staples announces in-store 3-D printing service