IEC: 61779-6, Ed.1-1999; Electrical apparatus for the detection and measurement of flammable gases- Part 6: Guide for the selection, Installation, use and maintenance of apparatus for the detection and measurement of flammable gases.

I.E.C.

IEC: 61779-6, Ed.1-1999; Electrical apparatus for the detection and measurement of flammable gases- Part 6: Guide for the selection, Installation, use and maintenance of apparatus for the detection and measurement of flammable gases. - 1st - Geneva IEC 1999 - 58

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