Global Electro-Diagnostic Equipment Market By Type (Electromyogram (EMG) , The Nerve Conduction (NCS) , Electrocardiography (ECG) , Electroencephalography (EEG) , Electroretinography (ERG) , and Electrogastrography (EGG)), By Application (Hospitals , and Research Institute ), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2020-2029