US Army, Technical Manual, TM 9-4910-432-10, OPERATORS MANUAL: GRINDING KIT, VALVE SEAT: ELECTRIC, 35 DEGRE TYPE, CONCRETE DRIVE, 1/4 HP, AC/DC, SINGLE PHASE, 115 V, 14,00 RATED, NO LOAD SPEED, (K. O. LEE CO., MODEL P300BB), (FSN 4910-06 AND, (MODEL P300B
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