内牙三通（Inner tooth three way）
规格（Type）
d
D
RP
h
L
T14-1/2F-14
9.
14.5
1/2
22
71
T16-1/2F-16
11.8
16.5
1/2
23
72
T18-1/2F-18
138
18.5
1/2
24
72
T18-3/4F-18
13.8
18.5
3/4
26
78
T20-1/2F-20
15.8
20.5
1/2
32
74.5
T20-3/4F-20
15.8
20.5
3/4
269
79
T25-1/2F-25
19.8
25.5
1/2
25
75
T25-3/4F-25
19.8
25.5
3/4
28.5
/81
T25-1F-25
19.8
25.5
1
28
89
T32-1/2F-32
25.8
32.5
1/2
31
80
T32-3/4F-32
25.8
32.5
3/4
31
85
T32-1F-32
25.8
32.5
1
31
93