Surveying Instruments-Namely, Theodolites, Transits, Pocket Compasses, Levels, Hand Levels, Range Finders, Planimeters, Stereoscopes, and Electronic Distance Meters; Measuring Instruments for Geophysics-Namely, Magnetometers, Gravity Meters, and Equatorial Telescopes; Measuring Instruments for Civil Engineering-Namely, Water Level Gauges, Current-Meters, Pore Water Pressure Gauges, Tension Meters, and Tiltmeters; Measuring Instruments for Dams-Namely, Plumb Line Units, and Elastic Wave Meters