| C23D | ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS | ||||||
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 Subclass indexes 
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Descriptions for C23D and notes/indexes are displayed on this screen.
Descriptions for C23D and notes/indexes are displayed on this screen.
| C23D | ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS | ||||||
| 
 Subclass indexes 
  |