DN2
t
t1
t2
D
h
1
h
2
h
N
1
DN1
DN2
f
a
w
h
h1
h2
t
t1
t2
n
n1
s
1~ 3~
445
75
139
260
145
59
242
129
113
185
145
11
21.7
21.7
471
165
–
21.9
445
139
21.9
21.9
471
165
–
21.9
445
139
24.1
23.9
471
165
–
24.0
510
s
a
w
n1
f
n