用氮气置换煤气时,一定要分析CO+H2≤0.3%为合格。用空气置换氮气时,一定要分析O2≥18%为合格。用氮气置换空气时,一定要分析O2≤0.3%为合格。
用氮气置换煤气时,一定要分析CO+H2≤0.3%为合格。用空气置换氮气时,一定要分析O2≥18%为合格。用氮气置换空气时,一定要分析O2≤0.3%为合格。
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