1. Tin is the chemical element tin.
Sn (chemical element tin) generally refers to tin (chemical element tin). Metal element, low melting point metal element, slightly blue-white luster, bivalent or tetravalent in compounds, and will not be oxidized by air. It mainly exists in the form of dioxide (cassiterite) and various sulfides (such as cassiterite). Element symbol Sn.
Tin is a famous "hardware"-one of gold, silver, copper, iron and tin. As early as ancient times, people discovered and used tin. In some ancient tombs in China, tin pots, tin candlesticks and other tin utensils are often excavated. According to research, during the Zhou Dynasty in China, the use of tin ware was very common. Tin daily necessities were also found in ancient tombs in Egypt.
Second, SN code is the abbreviation of SerialNumber, sometimes called SerialNo, which is the serial number of the product. Product serial number is a concept introduced to verify the "legal identity of products", which is used to protect the legitimate rights and interests of users and enjoy legal services; A set of genuine products only corresponds to a set of product serial numbers. Nicknames: machine code, authentication code, registration application code, etc.
The SN number of a mobile phone generally refers to the software registration code information, which is the serial number of the product, and SN is the abbreviation of seriesnumber. ESN is the abbreviation of ElectronicSerialNumber.