Global Hazardous Area Signaling Devices Market By Type (Strobe and Beacons , Other Signal Lights , Bells and Horns , Fire Alarm/Call Points , Speakers and Tone Generators , and Visual & Audible Combination Units), By Application (Oil and Gas , Chemical and Pharmaceutical , Food and Beverages , Energy and Power , Mining , and Others ), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2020-2029