extraction of iron from its ore

24:51

2:19

3:08

8:41

48:04

17:02

2:53

11:20

3:18

4:08

8:25

3:05

10:02

6:15

15:34

4:53

6:42

5:37

2:28

5:59

3:11

20:19

13:32

46:29

5:15

9:29

9:52

4:19

7:18

13:21

6:20

7:21

6:00

9:50

9:23

1:37

11:33

20:37

9:07

20:20

6:52

2:06

11:54

4:38

2:23

00:48

4:08

7:16

36:23

10:26

6:04

8:11

1:00:33

18:45

21:08

10:00

46:45

14:33

21:31

6:18