"CE" mark is one kind of safety certification, is the passport for manufacturers to enter into European market. Products labeled "CE" logo can be sold in European Union market without meeting every countries’ requirements independently, thus it realizes the free circulation of products in EU market. "CE" certification is mandatory attestation mark, whether the EU internal enterprise products, or products produced by others. To the free circulation in the EU market, they must labeled "CE" mark, to indicate that the products meet the basic requirements of the EU "technical the newest harmonize and instruction standard" . This is a mandatory requirement made by EU for products.