... quality,high purity 3.Rock bottom price,speedy delivery Copper Coated Gouging CarbonsShanghai Bochuan Silicon Carbon Rod Manufacturing Co., Ltd. is a company ... having widely application scales,good effects and economical.Instructions:The electrodes must keep in dry environment;if it is affected ... before use.When using for the direct current,the electrodes link to the anode,and task to the cathode. ...