oxygen demand theory

8:59

19:42

4:24

9:03

3:00

11:41

6:29

14:30

1:50

4:33

2:28

5:02

1:20:17

6:15

13:30

10:10

8:16

13:12

13:52

1:08:18

4:37

12:18

00:53

24:11

6:06

10:10

5:41

10:07

5:11

4:30

8:39

1:28

6:07

2:36

7:45

7:15

4:54

1:04

9:36

3:10

26:57

10:35

1:37

13:01

5:23

3:46

2:06

50:03

8:10

13:29

00:42

11:25

6:59

6:39

10:25

6:26

6:21

9:05

6:28

10:28