Global Gas Insulated Switchgear (GIS) Market By Type (Up to 38 KV, 38 KV-72KV, 72 KV-150KV, and Above 150 KV), By Application (Power Transmission, Integration of Renewable Power Generation Units to the Grid, and Industry Applications), By Region and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2019–2028