[KongchangAI]
Unverified88% confidenceDecision RuleTime unknown

制氧机看氧浓度稳定性:连续制氧模式下在最大流量时氧浓度仍能维持≥90%±3%才合格,很多便携机在3L/min以上时浓度会跌到70%以下,选购需看'最大流量下的浓度'而非'额定浓度'

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