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APPARATUS FOR ELECTRICAL MEASUREMENT OF MECHANICAL QUANTITIES-NAMELY, STRAIN GAUGES; TRANSDUCERS; MEASURING BRIDGES; (( TORQUE MEASURING APPARATUS; DIGITAL VOLT METERS; POTENTIOMETERS; AND COMPONENTS FOR )) ELECTRONIC WEIGHING APPARATUS-NAMELY, LOAD CELLS, AMPLIFIERS AND DIGITAL READ-OUTS; (( DATA READERS AND FUNCTION COMPUTERS; MICRO-SPOT WELDING APPARATUS FOR FASTENING OF STRAIN GAUGES; PROGRAM AND DECADE CIRCUITS WITH DIGITAL READ-OUT OF VALUE ))