IEC: 61779-1, Ed.1-1998; Electrical apparatus for the detection and measurement of flammable gases- Part-1: General requirements and test methods.

I.E.C.

IEC: 61779-1, Ed.1-1998; Electrical apparatus for the detection and measurement of flammable gases- Part-1: General requirements and test methods. - 1st - Geneva IEC 1998 - 55

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