background image

STEP 1

STEP 2

STEP 3

STEP 4

h X 4

D

E

B

C

a X 4

b X 4

c X 4

x2

small hole

b

h

h

h

h

H

d X 12

d

d

d

d

d

d

d

d

d

D

E

G

A

F

A

F

F

F

H

H

G

d

d

h X 8

b

b

a

a

a

a

c c

b

b

c c

d

h

h

h

h

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