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Subject 

1. Electricity  (5)
2. Lighting  (3)
3. Weapons  (3)
4. Blasting  (3)
5. Conversion Or Distribution Of Electric Power  (3)
6. Heating  (3)
7. Generation  (3)
8. Mechanical Engineering  (3)
9. Manufacture Of Assemblages Of Electrical Components  (2)
10. Printed Circuits  (2)
11. Arrangements Of Sealings In Combustion Engines  (2)
12. Cylinders, Pistons Or Casings, For Combustion Engines  (2)
13. Hot-Gas Or Combustion-Product Engine Plants  (2)
14. Casings Or Constructional Details Of Electric Apparatus  (2)
15. Electric Techniques Not Otherwise Provided For  (2)
16. Combustion Engines  (2)
17. Crankcase Ventilating  (1)
18. Checks For Wings  (1)
19. Brake Control Systems Or Parts Thereof, In General  (1)
20. Arrangement Of Braking Elements On Vehicles In General  (1)
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Language 

1. French  (2)
2. German  (2)
3. Japanese  (1)
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