A. CalipersB. External MicrometersC. Internal micrometersD. Measuring Instruments for Large DimensionsE. Electronic Indicators and Dial GaugesF. Dial Test Indicators (Lever-Type)G. Comparative MeasurementH. Measuring stands and auxiliary fixturesI. Straightness, angle and inclination measurmentJ. Length and angle standardsK. Calibration equipmentL. Surface Roughness TestingM. Height GaugesN. Electronic Length Measuring EquipmentO. Air Gauge Units for Diameter MeasurementP. Optical measurmentQ. Three-Axis Measurement