1/91/91/91/9

2222/9/9/9/9

3333/9/9/9/9

4444/9/9/9/9

1

2

A X 8 M6 X50

2

2

2

B X 8

C X 8

D X 1 F4

5555/9/9/9/9

1111

2222

1

2

1

2

2

2

A X 8

B X 8

C X 8

D X 1

CCCCBBBB AAAAAAAABBBBCCCC

X 4X 4X 4X 4CCCC

CCCC BBBB

BBBB

AAAA

AAAA

DDDD

2

6/96/96/96/9

7/97/97/97/9

8/98/98/98/9

9/99/99/99/9