what is the correct ratio of zinc to copper

کوتاه

6:38

7:05

5:32

3:07

5:32

5:32

5:54

3:07

4:43

5:32

5:23

5:42

2:13

4:06

2:33

3:51

2:35

1:24

27:32

4:38

2:00

1:18

54:58

1:20

2:07

1:29

10:35

کوتاه

49:12

1:25

7:34

1:19

4:02

18:11

19:00

1:37

3:33

53:13

کوتاه