DS EN 1834-2:2001 Reciprocating Internal Combustion Engines - Safety Requirements For Design And Construction Of Engines For Use In Potentially Explosive Atmospheres - Part 2: Group 1 Engines For Use In Underground Workings Susceptible To Firedamp And/Or Combustible Dust Defines the safety requirements and/or measures to remove the hazards and limit the risks on reciprocating internal combustion compression ignition engines of group category M[2] for use in undergroun