It is high precision mechanical parts and has Φ0.1 of vent holes on the smooth semiconducting for surface of the components with electroless nickel and very highly strict to the surface without any defects.
It is the component of a Machine and high in precision machined parts, which is very highly strict to perpendicularity tolerance requirement 0.01, surface treatment is electroless nickel deposition and the surface without any defects and scratches.