پیچش در مقاومت مصالح

14:25

5:15

43:29

40:46

10:16

7:12

41:05

4:42

13:55

15:55

59:59

20:08

20:54

4:29

17:05

9:06

5:35

1:02:07

19:37

9:23

1:16:50

42:46

14:20

20:57

19:15

17:32

7:09

16:41

8:09

15:35

2:36

2:36

17:05

3:36

3:36

2:46

3:52

7:07

28:08

3:58