CLEAN BENCH (dustless and bacteria-free) is also called clean working table. CLEAN BENCH can supply a partial clean space on working table. So, if managed and utilized properly, it shall be most economic way to obtain a working table with high clean space, which widely be applied in semiconductor trade and high precision trade etc. industrial purpose, as well as other purpose, such as scientific researching, such as medical treatment, pharmaceutical, and bio-chemistry & biology technology. Because of its widely application, except for standardized products, it also can be designed and manufactured according to the application purpose from customers.