Global Free-size Electric Enclosure Market By Type (Wall-mounted Enclosure , Floor-mounted/Free-standing Enclosure , and Underground), By Application (Power generation & distribution , Oil & Gas , Metals & Mining , Medical , Pulp & Paper , Food & Beverages , Transportation , and Others), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2020-2029