... 2.CNC machining 3.ISO901:2008 4.cast iron pipe fittings 5.sand casting pipe fittings Dalian Wills Machine Co., LtdWe are ... CNC machining 3. material: cast iron, cast steel,aluminum,brass,alloy, etc4. ISO 9001:20085. Working process:sand casting,investment casting,die casting forging,stamping,etc.6 ... Agent, we supply all the necessary assistant. 2011 sand casting CAST IRON ELBOW PIPE FITTINGS