- ashless coal
- беззольный уголь
English-Russian mining dictionary. В.П. Манышев.
English-Russian mining dictionary. В.П. Манышев.
Crucible — For other uses, see Crucible (disambiguation). A modern crucible used in the production of silicon ingots via the Czochralski process A crucible is a container used for metal, glass, and pigment production as well as a number of modern laboratory … Wikipedia