Monitors should be available to check for oxygen concentrations in the atmosphere when working with inert cryogens or with liquid oxygen.
当与惰性低温液体或液氧一起工作时，应备有监测器来检查空气中氧的浓度。
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Cryogenic experts at the NASA Glenn Research Center will develop models to explore mixtures and pressures of cryogens and gases and how they would react with a warm submarine.