PORTABLE CAR VACUUM MACHINE 1. Optimization of air duct-reducing wind resistance and noise 2.Tight Engagement of Components-Reducing Vibration Noise 3.GEDE BAO Noise Reduction Composite Cotton–Reducing Rotor Vibration Sound 4.Optimization of exhaust pipe-reducing exhaust howling 5.Dynamic balance noise reduction-reducing rotor vibration sound 6.Optimal noise reduction of impeller-reducing air resistance and noise 7.Motor suspension design-reducing resonance noise…

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