GOST IEC 61779-2-2006 Electrical apparatus for the detection and measurement of flammable gases. Part 2. Performance requirements for group I apparatus indicating a volume fraction up to 5% methane in air
2006GOST IEC 61779-2-2006 Electrical apparatus for the detection and measurement of flammable gases. Part 2. Performance requirements for group I apparatus indicating a volume fraction up to 5% methane in air