It is the quickest and most stable method to weld the conductor and rubber copper core with solder, which is suitable for mass production operation. 1, first measure the length of the required wire, and then a group of people will be responsible for cutting and stripping the wire ends. 2, and then another group of people weld, using ordinary ferrochrome and hollow tin wire containing flux, which is convenient and fast to operate. This method has the best stability and there is no problem of joint looseness and oxidation.