C23Level 2

COATING METALLIC MATERIAL

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C23CCOATING METALLIC MATERIAL

C23DENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS

C23FNON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE

C23GCLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS

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