Baoding Lin Rong Electrical Equipment Manufacturing Co., Ltd. (Contact: Guo Jingli Mobile: 15931240050, QQ: 2767726718, Website: www.linrongdq.com) the main switch. The easiest switch has two pieces called "contact" metal contact when two contacting current form a loop, when two contacts without contact current open. To consider the extent of the contact metal against corrosion choice, since most of the metal oxide will form an insulating oxide, the contacts does not work. Selection of contact metals may also need to consider the electrical conductivity, hardness, mechanical strength, cost and other factors, and is toxic. Sometimes the contact plating corrosion resistant metals. Typically the contact surface will be plated on the contacts in order to avoid affecting the performance of the oxide. Sometimes also use non-metallic contact surface conductive material, such as conductive plastic. In addition to the switch contacts, we will also have a movable member to make contact conducting or non-conducting, switching according to different movable member is divided into a lever switch (Toggle switch), key switch, Rocker Switch (Rocker switch), etc. while the movable member can also be other types of mechanical linkage. Company to "go beyond the self, Chong Hing future" for business purposes, with the majority of users want to get the common development; to "credit extension market, the service brand" business philosophy, to provide users with carefully selected and provide the best products; to "professional, focused, timely and thoughtful" to serve the purpose, to provide users of the service to your satisfaction!