Wuyi County Health hardcover books on cultural and educational Ltd. ---- shell machine shell brief book on hardcover books tell you that the entire surface of the shell machine shell is composed of a complete book cover material (such as whole cloth, the entire paper surface). Cover material junction book is not a single piece of shell, usually with a front and back cover material, the book back and pick from one material (eg cloth cover waist paper, cloth and leather waist bag corners). Hardcover is made of a soft material mounted surface, the inner layer of material and diameter paper consists of three parts. Pasting machine plastic shells are not included in the book industry standard word nails purchase needles, these books are generally in accordance with the requirements of the shell publishers and production. It is the use of high-frequency dielectric heating the plastic film, in accordance with the specifications of repression of books and book covers the entire surface. Plastic waterproof and resistant, it is often read or small format for dictionaries, manuals, books and the like binding books. When used, the stick at both sides of the cardboard core book stuffed in the plastic cover of the jacket became books. Book jacket shell is books, for books, it's hand plays the role of external decoration, but also to protect the books on the other hand it has a good usability. Therefore, the book should not only beautiful appearance shell, but also has durability, low production materials without deformation. In order to meet the people's growing demands books in large quantities of production, also claims the production casing and the core of the book Fit word nails needle supplier, easier to implement mechanization and automation of production. Wuyi County Health Culture and Education Ltd. ---- We are all real materials galvanizing process there are two types, hot-dip galvanized and electro-galvanized. Currently using more hot-dip galvanizing. So chemistry galvanizing technology is like? Galvanized chemistry technique: in a galvanizing bath containing plating bath, through a special cleaning and pretreatment to be plated as a cathode, an anode made of a metal plated, bipolar DC power supply coupled to the positive and negative electrodes, respectively. Galvanized plating liquid comprising a compound containing a metal, conductive salts, buffers, pH adjusting agents and additives of aqueous composition. After power word nails needles wholesale, galvanized liquid metal ion, in effect forming a potential difference of moving to the cathode layer. The anode is formed of metal ions into the metal galvanizing bath, in order to maintain the concentration of metal ions to be plated of. Galvanized, components of the anode material quality, the zinc solution, temperature, current density, power-on time, the intensity of stirring, the precipitated impurities, power supply waveform, etc. will affect the quality of the coating, the need for timely control. Now galvanizing technology is becoming increasingly important word nails needles, so the requirements are also increasing. Galvanized for various reasons have been banned, but there are still some small businesses convenient map, cheaper technology and the use of electro-galvanized, serious harm. Word nails needle dealers _ East Health legendary culture and education (certified) _ Jiangsu word nails needles provided by Wuyi County Health Culture and Education Limited. Wuyi County Health Culture and Education Ltd. (10003015604.ce.cc.com/) Zhejiang Jinhua, inventory of office, stationery leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Culture and Education in East Health Leadership staff warmly welcome all inquiries negotiations to create the East culture and education students a better future.