Global Medical Portable X-ray Device Market By Type (By Technology , Analog X-ray , Digital X-ray , By Device Type , Hand Held X-ray Devices , and Mobile X-ray Devices), By Application (Dental X-ray , Mammography , Chest X-ray , and Abdomen X-ray), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2020-2029