![[Avatar]](/images/avatar26.png){kind=avatar}
manholevalve5
1p1 comments posted · 0 followers · following 0
2 years ago @ http://www.makeupsavvy... - The Cult Beauty Starte... · 0 replies · +1 points
Cast iron valves are made of gray and ductile iron. Ductile iron has spherical graphites that have a higher strength than gray cast iron. The image on the right is ductile iron structure and the image on the left is gray cast iron.دریچه منهول
Medley