General printing presses and special printing presses
       1. General printing machine: The so-called general printing refers to the use of convex, flat, concave and other layouts, with paper as the printing material, printing newspapers, color pages, albums and other general printed objects as the main object, the main purpose of printing information Such as book printing machines, newspaper printing machines, etc.
       2. Special printing machine: printing machine for special printing, mainly including self-adhesive printing machine, hose printing machine, etc.