Mg
|
Fe
|
Zn
|
Mg
|
Fe
|
Zn
|
Mg
|
Fe
|
Zn
|
Mg
|
Fe
|
Zn
|
w
|
t
|
w
|
t
|
w
|
t
|
w
|
t
|
0
|
0
|
0
|
0
|
A B C D
|