For problems of low reliable performance and inadequate utilization of monitored data of safety monitoring system of coal mine. a viewpoint was proposed that system reliability could be improved by prolonging mean time between failures of important equipments and credibility of monitored data could be improved by method of data processing or redundancy. A new alarm method of safety mo... https://www.hindigyanvishv.com/deal-find-Canadian-White-Blenheim-Apricot-Tree-top-grab/