
Bs En 61779-5 - Electrical Apparatus For The Detection And Measurement Of Flammable Gases - Part 5: Performance Requirements For Group 2 Apparatus Indicating A Volume Fraction Up To 100 % Gas
出版:British Standards Institution

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Bs En 61779-5 - Electrical Apparatus For The Detection And Measurement Of Flammable Gases - Part 5: Performance Requirements For Group 2 Apparatus Indicating A Volume Fraction Up To 100 % Gas
出版:British Standards Institution
专家解读视频