Screws
Typical screws open a plastic surface filling in a whole in which a screw has been placed. In this way they ensure stable fixing on which one may hang particular items (cupboards, pictures, etc.). Special bolts that are used for joining two elements in a firm and stable way are also known. There are many kinds of bolts: used for wood, concrete, plastics or metal plates. The last ones are commonly used for joining not very heavy elements with metal plates (e.g. fixing upholstery to a motor-car body or the inside equipment in motor industry).
1. 16:30 (15:15 +1:15)
score: 1000




2. 17:11 (15:16 +1:55)
score: 700





3. 19:25 (17:15 +2:10)
score: 500



4. 20:13 (19:18 +0:55)
score: 400


5. 22:31 (21:21 +1:10)
score: 390



6. 22:43 (19:48 +2:55)
score: 380




7. 22:58 (17:28 +5:30)
score: 370



8. 23:20 (22:10 +1:10)
score: 360



9. 24:47 (17:22 +7:25)
score: 350



10. 26:30 (19:10 +7:20)
score: 340







11. 28:03 (23:33 +4:30)
score: 330




12. 28:12 (23:07 +5:05)
score: 320




13. 28:20 (20:15 +8:05)
score: 310





14. 28:28 (27:53 +0:35)
score: 300

15. 28:42 (24:47 +3:55)
score: 290




16. 29:22 (26:27 +2:55)
score: 280




17. 29:26 (26:26 +3:00)
score: 270




18. 29:29 (24:19 +5:10)
score: 260




19. 29:37 (28:12 +1:25)
score: 250

20. 30:20 (24:55 +5:25)
score: 240



21. 30:52 (25:47 +5:05)
score: 230



22. 31:06 (23:41 +7:25)
score: 220





23. 31:08 (29:18 +1:50)
score: 210

24. 31:41 (26:56 +4:45)
score: 200




25. 31:51 (26:26 +5:25)
score: 190




26. 32:04 (25:29 +6:35)
score: 180





27. 32:18 (27:48 +4:30)
score: 170




28. 32:23 (26:03 +6:20)
score: 160



29. 32:33 (21:33 +11:00)
score: 150



30. 33:16 (32:16 +1:00)
score: 140
