Refine My Results

Creation Date 

1. Before 1960  (27,108)
2. 1960 To 1975  (48,192)
3. 1976 To 1991  (126,293)
4. 1992 To 2008  (126,938)
5. After 2008  (345,928)
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Subject 

1. Transporting  (177,112)
2. Performing Operations  (177,112)
3. Lighting  (137,192)
4. Weapons  (137,192)
5. Blasting  (137,192)
6. Heating  (137,192)
7. Mechanical Engineering  (137,192)
8. Measuring  (105,471)
9. Testing  (105,471)
10. Electricity  (96,246)
11. Human Necessities  (59,129)
12. Engineering Elements And Units  (55,335)
13. Thermal Insulation In General  (55,335)
14. General Measures For Producing And Maintaining Effectivefunctioning Of Machines Or Installations  (55,335)
15. Control Or Regulating Systems In General  (52,363)
16. Functional Elements Of Such Systems  (52,363)
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Language 

1. English  (556,689)
2. Chinese  (154,803)
3. French  (91,947)
4. German  (82,697)
5. Korean  (20,565)
6. Japanese  (17,725)
7. Russian  (8,926)
8. Spanish  (8,659)
9. Portuguese  (3,934)
10. Swedish  (3,650)
11. Italian  (3,377)
12. Danish  (2,227)
13. Dutch  (1,855)
14. Finnish  (1,749)
15. Norwegian  (1,293)
16. Polish  (1,262)
17. Romanian  (410)
18. Ukrainian  (395)
19. Czech  (361)
20. Turkish  (263)
21. More options