... years forging experience forging insulator fitting for high-tension line Company introduction:1. Our company has advanced technological ... .Surface treatmentHeat treatment, Polishing, shot blasting, Painting, Electro-plating, Chemical Plating,InspectionEquipmentsMetallurgical analysis, Tensile strength tester, Hardness tester, Altimeter, ... days . Forging insulator fitting for high-tension line