Advantages comparison: Cast iron square box has light weight, keep the used precision after repeated scraping, service life is long. Marble square box is not magnetized, good rigidity, high hardness, abrasion resistance, no deformation, not afraid of acid, alkali liquid erosion, marble plate will not rust, it is not easy to sticky dust, easy maintenance and so on.
Defect comparison: Cast iron square box can not have rust, can not have cracks, can not have depression, cast iron square box is most afraid of working and storage in a corrosive environment. Marble square box is most afraid of the temperature difference between the impact of precision, most afraid of beating, bumping.