호흡구확장저풍과 장필터마스크측면유통풍커버

The present invention relates to a mask cover which provides the same efficiency as that of wearing five masks. According to the present invention, inhalation air and exhalation air through an 80 mm fine hole around a nose part of a mask pass through an expansion opening formed by blocking the centr...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	LEE, BONG KYUN, LEE, SEOK CHEOL, LEE, CHEON SEOK
Format:	Patent
Sprache:	kor
Schlagworte:	ACCESSORIES DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING FIRE-FIGHTING HUMAN NECESSITIES LIFE-SAVING OUTERWEAR PROTECTIVE GARMENTS WEARING APPAREL
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