英语翻译soldering is a very important process in jewelry manufac

英语翻译
soldering is a very important process in jewelry manufacture for joining various component parts into the finished piece,it involves heating the pieces to be joined and applying the solder alloy,which melts and runs along the joint gap,heating is typically by gas torch although oil lamps and blowpipes are still to be found in workshops,for mass production,soldering can be done in a belt furnace.