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燃化部第三石油机械厂早在1956年曾用球墨铸铁试制过泥浆泵缸套。最近该厂又为XC—700泥浆泵试制了几只球墨铸铁缸套,其中两只6 3/4时缸套,在泵压为
Third Department of Petrochemical Machinery Plant as early as 1956 had ductile iron trial mud pump liner. Recently the plant for the XC-700 mud pump trial of a few ductile iron cylinder liner, of which two 6 3/4 cylinder liner, the pump pressure is