naphthene 环烷;环烷烃;萘...naphthene base 环烷基...naphthene-base crude (petroleum) 环烷基石油...naphthene base oil 环烷基原油...reactable naphthene 可反应的环烷;可脱氢的环烷...five carbon ring naphthene 五碳环烷...
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