35CrMo圆钢-35CrMo圆钢
304不锈钢方管-304方管
Q235B焊管-Q235B焊管
316L不锈钢管-316钢管
Q345D圆钢-低合金圆钢
35CrMo圆钢-35CrM..
Cr12MoV圆钢