Based on a lot of experiments, the change range and average value of the linear expansion of polyurethane at low temperature have been given.

在大量实验的基础上给出了聚氨酯硬泡沫塑料低温线胀的变化范围和平均值。

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According to the non-linear theory of composition of the graded function materials distribution, the volume content function of polyurethane in the mixed resin was achieved.

本论文根据制备梯度功能材料成分分布的非线性理论，计算出聚氨酯在混合树脂中体积比的分布函数。

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The rain seemed to melt off the bike, which is sealed with epoxy and finished with linear polyurethane.

FORBES: First Ride: Audi x Renovo Duo Bicycle