A training target for OEM colleagues understand the characteristics of familiar mobile phone shell products, workmanship and quality. Processing methods of classification to identify two training content of 1 products and 2 products to identify quality. Three training details of the 1 product category of mobile phone shell Hard case 1 material yellow, not thorough, reflection is not so good, easy scratch easily broken. 2, PC Chi Mei material glittering and translucent, reflective good, not easy to scratch. Good flexibility, not easily broken. Crystal shells, we usually order this. 3, ordinary materials and Chi Mei material mixed with 4 ABS material, the hardness of this material is relatively large, that is, relatively hard. Relatively less use. Silicone case 1 A silica gel material is usually said with a nail from the top of the pure silica gel, silica gel, B 2 will not whiten material for ordinary material, will be white with a nail top. It smells good and smells bad. Usually this is what the guests order, and if the taste is too large, the guest will have a complaint. 3 elastic silicone, tensile degree is relatively large, usually mixed with ordinary silica gel,It can increase elasticity