refiner
精煉者,精煉機
Re·fin·er n. One who, or that which, refines.
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refiner
n : one whose work is to refine a specific thing; "he was a
sugar refiner"
Refiner
The process of refining metals is referred to by way of
illustrations in Isa. 1:25; Jer. 6:29; Zech. 13:9; Mal. 3:2, 3.