生产定制金属变径环缩径环扩径环
G11/4
10
14
57
10


G2-G11/2
G2
G11/2
10
14
64
5


德制螺纹


PG9-PG7
PG9
PG7
8
8.5
18
50


PG11-PG7
PG11
PG7
9
8.5
20