... Parts Production Standards used to ensure the best quality and high precision.Productsstandard and customized punchesguide pins, guide bushings ... grinder,inner-aperture grinder, Quadratic elementCNC grinding machine,CNC milling machine,polishing machine, engine lathe,Projector (imported from Japan) ... or Minus tolerances.2. Type of material and hardness needed.3. Part application.4. Target price if you ...