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Creation Date 

Subject 

1. Pictorial Communication, E.G. Television  (8)
2. Electricity  (8)
3. Electric Communication Technique  (8)
4. Lighting  (4)
5. Weapons  (4)
6. Blasting  (4)
7. Heating  (4)
8. Mechanical Engineering  (4)
9. Physics  (3)
10. Beds  (2)
11. Chairs  (2)
12. Diagnosis  (2)
13. Devices For Introducing Media Into, Or Onto, The Body  (2)
14. Domestic Articles Or Appliances  (2)
15. Coffee Mills  (2)
16. Domestic Hot-Water Supply Systems  (2)
17. Combined Heating And Refrigeration Systems  (2)
18. Air-Conditioning, Air-Humidification, Ventilation, Use Of Aircurrents For Screening  (2)
19. Devices For Producing Or Ending Sleep Or Stupor  (2)
20. Devices For Transducing Body Media Or For Taking Media Fromthe Body  (2)
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Language 

1. English  (11)
2. French  (9)
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