zone-refining区域提纯
gas zone zone refining气体区域提纯
cage zone-refining笼式区域精炼
electron beam zone-refining电子束区带精炼
continuous zone-refining apparatus连续区域精炼设备
zone-refining of uranium铀的区域精炼
pH-zone-refiningpH区带
large-scale zone-refining大型区域精炼
pH-zone-refining countercurrent chromatographypH区带逆流色谱
N（名词） a technique for producing solids of extreme purity, esp for use in semiconductors. The material, in the form of a bar, is melted in one small region that is passed along the solid. Impurities concentrate in the melt and are moved to the end of the bar 区域精炼法