委内瑞拉产的重质环烷基原油是生产军用润滑油的必备，俄国和中国产的环烷基油在制造润滑油上差很多。

来源: 晓筠于 2026-05-07 14:55:48 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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