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\ butene的例句（butene在句子中的用法）

butene的例句（butene在句子中的用法）

The mass fraction of n - butene in mixed C 4 from catalytic cracking after etherized was approximately 40 %. 醚化后的催化裂化混合C4中含有质量分数约为40%的正丁烯,是生产丙烯的优质原料.
Duplication of bands in this region also shown by trifluoropropyne and perfluoro 2 - butene. 三氟丙炔和全氟丁烯 -2 在这个区域也出现双重谱带.
Duplication of bands in this region is also shown by trifluoropropyne and perfluoro 2 - butene. 三氟丙炔和全氟丁烯 -2 在这个区域也出现双重谱带.

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