With the increasing popularity of explosion-proof electrical appliances, many explosive dangerous places are installed with explosion-proof electrical appliances. Many end users believe that as long as the explosion-proof electrical appliances are installed in the explosive dangerous places, everything will be OK.
Coal mine mark certification (referred to as Ma, Ka certification) is a kind of compulsory certification implemented by the National Coal Mine Safety Mark Office for coal mine underground supplies. All products in the mine product safety certification directory must obtain the certification certificate.