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φ7 φ7
φ6.8 φ6.8
φd
c b
e
h
eh
f
φd
c b
f
10.5
15
22.5
30
φ6.8
7 L1 14.5
H
L
φd
φ6.8
14.5
H
L1
L
φd1 φd2
18
22
30
37