Considering its colourable and castable nature, its extended hardness range, low wear and superior load bearing capacity, polyurethane is a smart substitute for rubber.

考虑到着色和浇铸料的性质，选择具有更大硬度范围，低磨损，优越承载能力的聚氨酯替代橡胶是明智的。

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The results show that the range of austenitizing temperature required for bainite hardening and the hardness of bainite ductile cast iron is increased as vanadium is added.

研究结果表明，钒使贝氏体转变所要求的奥氏体化温度范围增大，并使贝氏体球铁的硬度提高。

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The hardness of cigarette was affected slightly by the change of tobacco rod density in certain range.

烟支密度在一定范围内变化对烟支硬度的影响不大。

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