- Youigniteamatchbyscratchingit.Don'tbackdownbutdon'tignitethesituation.Theburninggasescanignitetheleanmixture.Sometimes,justasmallsparktoignitethepowder.Ammonia-airmixturesarequitedifficulttoignite.Ourinvestmentmantraistoigniteraginginfernoswithasin...
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