... Bench is a strong level of generic-type laminar flow clean bench, cabinet with steel producti CJ series level one- ... Bench is a strong level of generic-type laminar flow clean bench, cabinet with steel production, the surface electrostatic spraying; ... the field and laboratory. Bench CJ series level one-way flow: SpecificationCJ-820CJ-1680Cleanliness levelThe size of ≥ 0.5um, dust ≤ 3 ...