... service 3.Material:ductile iron 4.Model:round 700 round 700 ductile iron manhole coverproductmaterialmodelweightcolorapplicationround 700 ductile iron manhole coveriron700x5060kgblack motorized vehicles, municipal ... pipelines, communications, power and water supply and other projects round 700 ductile iron manhole cover1. Put damage: This is the biggest ...