What is 63C 64C in Abrasives

What is 63C 64C in Abrasives?

Usually abrasives include electrocorundum and carborundum.

Electrocorundum includes white electrocorundum,brown electrocorundun,pink electrocorundum,black electrocorundum and carborundum includes black carborundum and green carborundum.

63C 64C means green carborundum,which is calling from russia.

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