Global Dental X-ray System Market By Type (Ordinary X-Ray Machine, Panoramic X-Ray Machine, And Cbct), By Application (Imaging Of Several Teeth (1 ~4 Teeth), 2d Imaging, Panoramic Oral Examination, (Lateral Cephalometric X Ray Is Optional), 2d Imaging, Low Radiation, Short Scan Time, And 3d Imaging), By Region and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2019-2028