| http://www.w3.org/ns/prov#value | - In one embodiment, the motor is a brushless DC motor and the speed of the motor 76 is approximately 50,000 to 150,000 RPM. The rotation of the rotor 56 relative to the casing 58 causes gas to be pumped radially outward away from the axial centerline 18 or radially inward toward the axial centerline 18, depending on the sense of rotation, from the gas inlet 52 to the gas outlet 54.
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