Some of this type of sealant is pure rubber varieties, most with good adhesive performance.

这类密封胶中有些品种是纯橡胶，大多数具有良好胶粘剂的性能。

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Mold design and characteristics of pure rubber boot was introduced. Mold design plan was analyzed and compared.

介绍了纯胶球头防尘罩模具的设计方法及模具特点，对防尘罩生产模具的设计方案进行了分析、比较。

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One experiment led him to combine sulfur with the pure rubber, whereupon he accidentally dropped the mixture onto a red-hot stove.

在一次实验中，他必须将硫磺和纯橡胶混合在一起。

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