spec ex Defense Technical Information Center
of 100 mm, the size of the ball D = 9 mm evidently will be critical; having O loaded a mill, which has balls of the critical diameter of 9 mm, from batches of ouartz with an original coarseness of 100 mm, it will be impossible to receive a finished product of 90 less than 200 mesh, even with an extremely great continuance of pulverization.