Specialized classification of laboratory drying equipment used in research and development and quality control departments. Includes equipment specialized for precise drying processes at laboratory level, such as hot air circulation dryers, vacuum dryers, freeze dryers, and infrared dryers. Used for moisture removal in material testing, pretreatment of resin and metal samples, drying of specimens for chemical analysis, and moisture content measurement applications in quality inspection. Distinguished from large-scale drying equipment in manufacturing sites, targeting desktop to medium-sized experimental drying equipment capable of small capacity and high-precision temperature control. Unlike constant temperature chambers or incubators, these have functions specialized for moisture removal and drying.