This machine has four vibration plate: slider body; cap; lock hook; pull sheet; after vibration automatically arranged into orbit;; driven by the motor rotation to complete assembly protractor, each of the parts; and the riveting point of four; to achieve the purpose. Advantages: no need to replace any accessories; you can assemble a variety of special drawing tablets; speed per minute 100; automatic frequency control; mechanical stability; durability; maintenance is simple, the operation is very simple; welcome to negotiate; Please add micro signal: lianghong6398