AA-S-1965, FEDERAL SPECIFICATION: STOOLS, REVOLVING (30-JAN-1991) [S/S BY A-A-50866B]

AA-S-1965, FEDERAL SPECIFICATION: STOOLS, REVOLVING (30-JAN-1991) [S/S BY A-A-50866B]., This specification covers two type of revolving stools having a circular padded seat, suitable for use with optical refracting and examining units.