Global Gas Leak Detectors Market By Type (Portable Gas Leak Detectors , and Desk-top Gas Leak Detectors), By Application (Building and Construction , Health Care , Food and Beverages , Water Treatment , Oil and Gas Refineries , Chemical Plants , Underground Gas Storage Facilities , and Other), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2020-2029