... (11) Certifications: CE, RoHS, and CCC(12) Dimensions: 630x274x180mm(13)Patents:design patent in : Europe,Australia,The united states,Japan ... it works: Air is accelerated through an annular aperture and over a 18° airfoil-shaped ramp, generating an ... , brushless motor A combination of the technologies used in turbochargers and jet engines generates powerful airflowAir is accelerated: Airflow ...