| 摘要 |
PROBLEM TO BE SOLVED: To provide a medical oxygen concentrator capable of easily confirming setting of a concentrated oxygen flow rate. SOLUTION: In the oxygen concentrator, which is provided with a flow rate setting means for setting the flow rate of concentrated oxygen to be supplied to the outside and sets the concentrated oxygen flow corresponding to the rotation angle of the knob of the flow rate setting means, this device can set the attachment of the rotary shaft and knob of the flow rate setting means at the angles of at least two kinds.
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