Exhaust FanChina Portable 2D/3D/4D Ultrasound Machine/ Color Doppler Ultrasound Scanner Velocity, Heart Rate, Flow Velocity, Find details about China 2D/3D/4D Ultrasound, 2D/3D/4D Color Doppler from Portable 2D/3D/4D Ultrasound Machine/ Color Doppler Ultrasound Scanner Velocity, Heart Rate, Flow Velocity