... Main Manufacturing Procedure: 1, Copper wire drawing and annealing.2, Copper wire stranding .3,PVC insulation extruding.4 ... ,Cores Twisting.5,Spooling. Main Quality Inspection Equipment:Spark Tester,Heating aging Chamber,High resistance machine ... Current bridge.,Plastic tester,Projector,Punch machine,Cross-linked cutting machine,etc.All oversea orders are ...