Pressure piston machine uses binary systems State Administration of Taxation national uniform invoice shaped, steel materials, special structure, refining the character wheel surface, particularly suitable for all types of high speed internet (flat compression) printer for high-quality machine numbers supporting the use requirements. It has a long life, into the reset flexible, low rate of wrong number. Glyph font height and bits and spacing according to customer request, this product can also undertake non-standard orders according to user requirements