Cleanrooms are core production and testing environments in industries such as precision manufacturing, biomedicine, food testing, and electronic chip processing, relying on overall environmental control to achieve complete cleanliness. However, overall cleanliness cannot completely eliminate localized micro-contamination caused by personnel operations, equipment operation, and material handling. Clean benches, as core high-precision localized purification equipment within cleanrooms, can create a Class 100 ultra-clean operating area on top of overall cleanliness, filling the gaps in localized purification within cleanrooms. They are crucial equipment for ensuring product qualification rates, experimental accuracy, and production compliance.