reaction of soap with hard water and soft water scum formation

کوتاه

1:25

2:17

14:17

1:37

1:36

1:33

1:53

2:01

2:01

16:41

4:15

15:04

6:43

6:43

4:24

4:24

3:23

8:51

2:33

10:09

کوتاه

4:27

10:01

6:43

4:27

2:24

2:33

5:42

10:01

4:27

10:02

32:06

6:43

4:27

4:09

5:47

5:42

12:42

10:19