1.Quality oxygen generator muaj "plaub ntshai" - ntshai hluav taws, ntshai tshav kub, ntshai plua plav, ntshai ya raws.Yog li ntawd, thaum siv lub tshuab pa oxygen, nco ntsoov kom tsis txhob muaj hluav taws kub, tsis txhob muaj teeb pom kev ncaj qha (hnub ci), qhov kub thiab txias ib puag ncig;feem ntau them mloog mus rau ...
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