THOMPSON TRUFORMING

GRINDING MACHINES, EXCEPT SMALL PORTABLE HAND MANIPULATIVE ELECTRIC GRINDING MACHINES-NAMELY, SURFACE GRINDERS, INTERNAL GRINDERS, UNIVERSAL GRINDERS, THREAD GRINDERS, BROACH GRINDERS, CYLINDRICAL GRINDERS, AND VERTICAL GRINDERS, AND AUXILIARIES THEREFOR SUCH AS WORKHOLDING FIXTURES, AND ITEMS OF A SIMILAR NATURE WHICH CONVERT A STANDARD CATALOG ITEM MACHINE TO ONE HAVING IN GENERAL, A SPECIAL USE