Clean benches, also known as purification benches, are designed to meet the requirements for clean work areas in modern industries, optoelectronics, biopharmaceuticals, and scientific research. They draw air into a pre-filter through a fan, pass it through a static pressure box into a filter, and then discharge the filtered air as a vertical or horizontal airflow, achieving a 100-grade cleanliness level in the operational area to ensure the cleanliness of the production environment. Clean benches are typically 100-grade and mainly divided into two types: horizontal laminar flow and vertical laminar flow. They are available in two operational structures: single-sided and double-sided, and can also be categorized as standard clean benches and biological clean benches based on their applications.