21 14 487 2,322 2 7 48 4 15 ( 27) 14 3(1867) 3 () 1
2
3
( 901923 ) 5 (1536) 3 4
5
6
7
8
( ) () () 9
10
21 11
12
13
14
16
17
18
20 1 19
20
21
22
23
21 22 24
25
26
27
28
22 5 29
30cm 7.5m 1865 3 1820 5 1834 1.3m 30
31
10 1.5 22 2 22 32
33
34
21 8 35
36
37
38
12 39
40
41
42
43
44
S=1:500 () () S=1:500 45
46
47
48
49
50
51
22 11 14 52
53
54
55
23 27 5 23 24 200,000 56