区域提纯: zone pruificationzone purificationzone refining
Example Sentences:
1.
These metals may be purified by a technique called zone refining . 这些金属可以用所谓“逐区提纯法”来提纯。
2.
Petroleum and related products - preparation of a test portion of high - boiling liquids for the determination of water content - nitrogen purge method 石油和相关产品.水含量的测定用高沸腾液体的试验部分的准备.氮提纯法
