生产定制金属变径环缩径环扩径环
PG29
PG16
12
11.5
41
25


PG29-PG21
PG29
PG21
12
11.5
41
25


PG36-PG21
PG36
PG21
12
12.5
52
25


PG36-PG29
PG36
PG29
12
12.5
52
25