;
The diolefins and alkenyl aromatics are very unstable components which can give gums by polymerization.In giving olefins and alky aromatics the hydrogenation improves the product quality.
烯
和烯
芳是非常不稳定
组分，可聚合产生凝胶。对于给定烯和
芳，氢化可以改善产品质量。
The diolefins and alkenyl aromatics are very unstable components which can give gums by polymerization.In giving olefins and alky aromatics the hydrogenation improves the product quality.
烯和烯芳是非常不稳定组分，可聚合产生凝胶。对于给定烯和芳，氢化可以改善产品质量。
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