| 英文名称: | | Alkenes, ethylene-manuf.-by-product C5-cut, oligomers, polymers with steam-cracked petroleum distillates | | alkenes, ethylene-manuf.-by-product c5-cut, oligomers, polymers with steam-crac | | ked petroleum distillates | | alkenes, ethylene-manuf.-by-product c5-cut, oligomers,polymers with steam-cracked petroleum distillates | | Alkenes,ethylene-manuf.-by-product C5-cut,oligomers,polymers with steam-cracked petroleum distillates |
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