ISO 8512-2:1990

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ISO 8512-2:1990 is an international standard from the International Organization for Standardization (ISO) that specifies requirements for rectangular or square granite surface plates. The standard covers dimensions (ranging from 160 mm x 100 mm to 2500 mm x 1600 mm), and grades of accuracy (0, 1, 2, and 3). It essentially outlines the characteristics and tolerances for granite surface plates used in precision measurement and engineering applications.