The sides of the oxygen enriched membrane device are all sealed except top, the bottom and the joint of the air inlet tube.
富氧化膜装置除其上面和底部与进气软管连接处外，其余各面均密封。
The sides of the oxygen enriched membrane device are all sealed except top, the bottom and the joint of the air inlet tube.
富氧化膜装置除其上面和底部与进气软管连接处外，其余各面均密封。
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