... .High quality,high purity 3.Rock bottom price,speedy delivery Copper Coated Gouging CarbonsShanghai Bochuan Silicon Carbon Rod Manufacturing Co., Ltd ... rods.Carbon rods made by Bo chuan company include DC copper coated jointed,flat and pointed gouging rods.Bochuan has advanced ... ,the electrodes link to the anode,and task to the cathode.Keeping steady of working air pressure 0.5-0.6Mpa ...