- rectifying section
- 提纯: purification; purify; refine ...
- 段: section; segment; part; para ...
- 提纯: purification; purify; refine; refinement◇提纯复壮 purification and rejuvenation; 提纯剂 purificant; 提纯器 purifier; 提纯塔 purifying column [tower]; 提纯油 good oil
- 超提纯: ultrapurification
- 电提纯: electro refining; electrorefining
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