,
1
...
28
29
30
31
32
33
34
35
36
37
38
39
40
...
69
1 -
ZnS, CdS CuS
, N--5-
N- 4--1,4-
2.
. .09
-
- Cr Mn
II. . .
IX. .
, ,
XX .:
-
- I- .
XX .:
,
1
...
28
29
30
31
32
33
34
35
36
37
38
39
40
...
69
