Since the year 1984 PRECISION GRANITE has been providing precision granite metrology products to companies worldwide including m
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Federal Specification GGG-P-463c and ASME B89.3.7-2013._Granite Precision Surface Plates Manufacturer
GGG-P-463c September 10, 1973 SUPERSEDING Fed. Spec. GGG-P-463b September 12, 1973 FEDERAL SPECIFICATION PLATE, SURFACE, (GRANIT
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