Terms containing multiple refining

Subject	English	Chinese
met.	multiple copper refining system	铜的并联电解精炼系统
met.	multiple electron gun zone refining	多电子枪区域精炼
met.	multiple refining	多次精炼
tech.	multiple zone refining	多熔区区域精炼
met.	multiple-zone refining	多熔区区域精炼