Classification of laboratory power supply equipment and electronic measuring instruments used in experimental, research and development, and quality control departments. Includes experimental power supply devices such as DC power supplies, AC power supplies, and variable power supplies, as well as electronic measurement equipment such as oscilloscopes, multimeters, signal generators, and spectrum analyzers. Used for product development, circuit design, electronic component characterization, and production line inspection, distinguished from general factory equipment power supplies and production measuring instruments as research and development specialized equipment.