系数f3的计算值(GB/T 18150—2006)
︱z2-z1︱	f 3	︱z2-z1︱	f 3	︱z2-z1︱	f 3	︱z2-z1︱	f 3	︱z2-z1︱	f 3
1	0.0253	21	11.171	41	42.580	61	94.254	81	166.191
2	0.1013	22	12.260	42	44.683	62	97.370	82	170.320
3	0.2280	23	13.400	43	46.836	63	100.536	83	174.500
4	0.4053	24	14.590	44	49.040	64	103.753	84	178.730
5	0.6333	25	15.831	45	51.294	65	107.021	85	183.011
6	0.912	26	17.123	46	53.599	66	110.339	86	187.342
7	1.241	27	18.466	47	55.955	67	113.708	87	191.724
8	1.621	28	19.859	48	58.361	68	117.128	88	196.157
9	2.052	29	21.303	49	60.818	69	120.598	89	200.640
10	2.533	30	22.797	50	63.326	70	124.119	90	205.174
11	3.065	31	24.342	51	62.884	71	127.690	91	209.759
12	3.648	32	25.938	52	68.493	72	131.313	92	214.395
13	4.281	33	27.585	53	71.153	73	134.986	93	219.081
14	4.965	34	29.282	54	73.863	74	138.709	94	223.817
15	5.699	35	31.030	55	76.624	75	142.483	95	228.605
16	6.485	36	32.828	56	79.436	76	146.308	96	233.443
17	7.320	37	34.677	57	82.298	77	150.184	97	238.333
18	8.207	38	36.577	58	85.211	78	154.110	98	243.271
19	9.144	39	38.527	59	88.175	79	158.087	99	248.261
20	10.132	40	40.529	60	91.189	80	162.115	100	253.302