沟槽尺寸			O型圈
d	D	B	O型圈
8	15.5	3.75	10.6*2.65
10	17.5		12.5*2.65
12	19.5		14*2.65
14	21.5		16*2.65
16	23.5		19*2.65
18	25.5		20*2.65
20	31.0	5.5	23.6*3.55
22	33.0		26.5*3.55
25	36.0		28*3.55
28	39.0		31.5*3.55
30	41.0		34.5*3.55
32	43.0		36.5*3.55
35	46.0		37.5*3.55
36	47.0		41.2*3.55
40	55.5	7.75	43.7*5.3
45	60.5		50*5.3
50	65.5		53*5.3
55	70.5		58*5.3
60	75.5		63*5.3
63	78.5		67*5.3
65	80.5		69*5.3