China Hospital Medical Disposable Venturi Mask - China ce and iso certificates medical disposable adjustable oxygen venturi mask
Hospital Medical Disposable Venturi Mask Description The oxygen concentration can be selected from 24% to 50% in seven level 24%, 26%, 28%, 30%, 35%, 40%, 50%, two diluters in different colors, the white one for medium concentration, the green one for low concentration.
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