hexacyclic compound
六元杂环化合物 Six-Membered Heterocyclic Compounds
环己六醇类化合物 cyclohexitol
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在非采暖季机动车尾气排放的贡献率为70%，在采暖季贡献率为50%，煤的燃烧对六环化合物的贡献高于机动车排放的贡献。
The exhausts contribution in no-heating season was 70% and 50% in heating season; but the 6 ring compounds distribution from coal combustion was higher than that from the exhausts.
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