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2. 2011 To 2013  (9)
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Subject 

1. Chemistry  (18)
2. Metallurgy  (18)
3. Textiles  (15)
4. Transporting  (15)
5. Performing Operations  (15)
6. Compositions Based Thereon  (15)
7. Their Preparation Or Chemical Working-Up  (15)
8. Organic Macromolecular Compounds  (15)
9. Production Of Cellulose  (13)
10. Paper-Making  (13)
11. Compositions Of Macromolecular Compounds  (9)
12. Paper Not Otherwise Provided For  (9)
13. Preparation Thereof Not Covered By Subclasses D21c Or D21d  (9)
14. Impregnating Or Coating Of Paper  (9)
15. Pulp Compositions  (9)
16. Treatment Of Finished Paper Not Covered By Class B31 Or Subclass D21g  (9)
17. Coating Compositions, E.G. Paints, Varnishes Orlacquers  (7)
18. Adhesives  (7)
19. Chemical Paint Or Ink Removers  (7)
20. After-Treatment Not Covered By Subclasses C08b, C08c, C08f,c08g  (7)
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