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China Railway Group has most patents in tunnel safety monitoring
Tunnel safety monitoring helps to rescue people inside a tunnel and to maintain air quality and control spread of smoke in case of fire or a disaster.
https://www.mining-technology.com/data-insights/innovators-tunnel-safety-monitoring-mining/?cf-view
cover tunnel photo by: Matt Brown from London, England / CC BY
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https://www.mining-technology.com/data-insights/innovators-tunnel-safety-monitoring-mining/?cf-view
Leading innovators in tunnel safety monitoring for the mining industry
www.mining-technology.comGlobalData uncovers the leading innovators in tunnel safety monitoring for the mining industry.