Acidity analysers; Alarms for the detection of inflammable gases; Anemometers; Apparatus for testing gas, liquids and solids; Artificial limbs for medical instruction purposes; Communication modems; Depth gauges; Digital multimeters; Dynamometers; Extension cables; Flowmeters; Force measurement products, namely, digital force gauges, digital torque gauges and manual and motorized test stands used therewith sold as a unit with the gauges; Gas testing instruments; Gravimeters; Gravity measuring instruments; Hydrometers; Laboratory apparatus, namely, centrifuges; Laboratory centrifuges; Laboratory chemical reactors; Magnetic agitators for laboratory use; Measuring buckets; Measuring cups; Measuring instrumentation and apparatus, namely, digitizers; Measuring rules; Medical teaching mannequins; Metal hardness testing machines; Metal strength testing machines; Metering orifices, namely, orifice plates for metering or controlling the flow rate of liquids; Microscopes and their parts; Modems; Noisemeters; Ohmmeters; Opacimeter; Optical inspection apparatus; Oscillographs; Photometers; Polarimeters; Precision balances; Radiation-measuring instruments; Resistance measuring instruments; Rheometers for measuring the viscosity and viscoelasticity of fluids; Saccharometers; Salinometers; Scientific apparatus and instruments, namely, ultra-high vacuum chambers; Scientific apparatus, namely, spectrometers and parts and fittings therefor; Scientific instrumentation for measuring concentrations of chemicals in water; Scientific measuring instruments, namely, conductivity meters; Sound level meters; Stroboscopes; Surveying machines and instruments; Technical measuring, testing and checking apparatus and instruments for measuring, testing and checking the temperature, pressure, quantity and concentration of gas and liquids; Telescopes; Thermocouples; Torsion testers; Ultrasonic flaw detectors; Ultrasonic thickness gauges; Viscosimeters; Wattmeters; Laboratory pipettes; voltage, amperage, telephone lines, continuity testers