Refine My Results

Creation Date 

1. Before 1960  (3,293)
2. 1960 To 1975  (14,669)
3. 1976 To 1991  (39,276)
4. 1992 To 2008  (39,269)
5. After 2008  (41,615)
6. More options 

New Records 

1. New From Last Week  (62)
2. New From Last Month  (2,063)
3. More options 

Subject 

1. Engineering Elements And Units  (55,862)
2. Thermal Insulation In General  (55,862)
3. General Measures For Producing And Maintaining Effectivefunctioning Of Machines Or Installations  (55,862)
4. Actuating-Floats  (43,006)
5. Cocks  (43,006)
6. Devices For Venting Or Aerating  (43,006)
7. Taps  (43,006)
8. Valves  (43,006)
9. Ventilating  (31,413)
10. Ranges  (31,413)
11. Performing Operations  (23,069)
12. More options 

Language 

1. English  (111,182)
2. German  (24,715)
3. French  (23,319)
4. Chinese  (9,434)
5. Korean  (3,435)
6. Spanish  (2,796)
7. Japanese  (1,774)
8. Italian  (1,744)
9. Swedish  (1,334)
10. Russian  (1,085)
11. Portuguese  (1,084)
12. Danish  (1,078)
13. Dutch  (675)
14. Finnish  (649)
15. Norwegian  (501)
16. Polish  (478)
17. Czech  (161)
18. Ukrainian  (100)
19. Turkish  (97)
20. Romanian  (74)
21. More options