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catalogs, technical and scientific handbooks, textbooks, and technical reference textbooks about measuring, controlling, and/or regulating industrial and laboratory process temperature, humidity, pressure systems, strain gages, force-balance meters, flowmeters, level indicators, hydrogen-ion activity, load characteristics, load compensation, vibrational levels, electrical resistance, air velocity, amperage, frequency response, voltage, ion concentration, conductivity, and in industrial and laboratory process measurement and control data acquisition, display and retrieval