difference between vented and non vented bipapniv masks

کوتاه

کوتاه

3:29

5:55

2:56

7:52

6:25

4:14

1:07:46

19:54

4:38

6:58

12:04

3:05

3:46

12:14

4:42

7:22

2:36

8:03

2:28

1:15

8:49

2:21

13:37

7:24

6:13

کوتاه

1:05

29:39

1:37

کوتاه

3:12

8:20

4:38

11:22

11:22

6:01

5:27

4:06