- over head
- 前: front
- 馏份: fraction; cutter stock; cut; ...
- 前馏份；拔头油: over head
- 馏份: [石油工业] fraction; cutter stock; cut; cut fraction 轻馏份 light fraction; 重馏份 heavy fraction; 馏份收集器 fraction collector; 馏份组成 [化学] fractional composition
- 初馏份: first cut; first fraction; overhead distillate; overhead fraction
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