INSTRUMENTS FOR EDUCATIONAL PURPOSES-NAMELY, CALIPERS, GAUGES, MICROMETERS, PROTRACTORS, RULERS, BLOCKS, BALANCES AND MAGNIFIERS

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EDUCATIONAL TEACHING AIDS-NAMELY, TIMERS, BALANCES, DIAMETER GAUGES, DEPTH GAUGES, FEELER GAUGES, CALLIPERS, RULERS, CLINOMETERS, PROTRACTORS AND MICROMETERS