A. A mixture of Flammable gas in air whose gas percentage is above the UFL (Upper flammable Limit) B. A mixture of Flammable gas in air whose gas percentage is between the LFL and UFL. C. A mixture of Flammable gas in air whose gas percentage is below the LFL (Lower Flammable Limit) D. A mixture of Flammable gas in air whose gas percentage is between 10%of the LFL and LFL. « Previous Next »
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