生产定制金属变径环缩径环扩径环
12.5
46
25


M40-M32
M401.5
M321.5
12
12.5
46
25


M50-M32
M501.5
M321.5
12
12.5
55
10


M50-M40
M501.5
M401.5
12
14
55
10


M63-M40