求推荐个2千到3千左右的5l制氧机

看花眼了
https://item.jd.com/100052263793.html

https://item.jd.com/100019154388.html

https://item.jd.com/100045076762.html

https://item.jd.com/100035146989.html

https://item.jd.com/100040361070.html

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