直径
1根
2根
3根
4根
5根
6根
7根
8根
9根
10根
11根
12根
13根
14根
15根
16根
3
7.1
14.2
21.3
28.4
35.5
42.6
49.7
56.8
63.9
71
78.1
85.2
92.3
99.4
106.5
113.6
4
12.6
25.2
37.8
50.4
63
75.6
88.2
100.8
113.4
126
138.6
151.2
163.8
176.4
189
201.6
5
19.6
39.2
58.8
78.4
98
117.6
137.2
156.8
176.4
196
215.6
235.2
254.8
274.4
294
313.6
6
28.3
56.6
84.9
113.2
141.5
169.8
198.1
226.4
254.7
283
311.3
339.6
367.9
396.2
424.5
452.8
6.5
33.2
66.4
99.6
132.8
166
199.2
232.4
265.6
298.8
332
365.2
398.4
431.6
464.8
498
531.2
8
50.3
100.6
150.9
201.2
251.5
301.8
352.1
402.4
452.7
503
553.3
603.6
653.9
704.2
754.5
804.8
8.2
52.8
105.6
158.4
211.2
264
316.8
369.6
422.4
475.2
528
580.8
633.6
686.4
739.2
792
844.8
10
78.5
157
235.5
314
392.5
471
549.5
628
706.5
785
863.5
942
1020.5
1099
1177.5
1256
12
113.1
226.2
339.3
452.4
565.5
678.6
791.7
904.8
1017.9
1131
1244.1
1357.2
1470.3
1583.4
1696.5
1809.6
14
153.9
307.8
461.7
615.6
769.5
923.4
1077.3
1231.2
1385.1
1539
1692.9
1846.8
2000.7
2154.6
2308.5
2462.4
16
201.1