jeongryeonsikineun geot
refinement
raffinage ; purification ; amélioration
금속의 정련시키는 것은 매우 중요하다.
geumsog-ui jeongnyeonsikineun geos-eun maeu jungyohada.
The refinement of metals is very important.
More words starting with 정
We review every report and fix data issues fast.