PS NB
x
0.5 0
-0.5
(x)
NB
x
0.5 0
-0.5
(x)
(y)
PB Z
y
12 6
0
PS
(y)
PB Z
y
12 6
0
PS
Trang 40 1 -1
0
0.75 0.25
-1
0
0.75 0.25
Trang 56 12 0
0
0
0
0
1
0.5
-0.5
y S
x
0.75
6
1.0 x s
y
12
3.6
0
7.2
-0.3
0
1
0.5
-0.5
y S
x
0.75
6
1.0 x s
y
12
3.6
0
7.2
-0.3