Protective face masks for medical use; respiratory masks for medical purposes; personal air filtering unit; sanitary masks for dust prevention for medical purposes; face coverings being sanitary masks for protection against viral infection; powered air purification respirators for artificial respiration; personal protective equipment (PPE), namely, face shields for medical use and masks for use by medical personnel

'air':13,35 'artifici':39 'cover':25 'dust':19 'equip':43 'face':2,24,46 'filter':14 'infect':33 'mask':3,8,17,28,52 'medic':5,10,22,49,56 'name':45 'person':12,41 'personnel':57 'power':34 'ppe':44 'prevent':20 'protect':1,30,42 'purif':36 'purpos':11,23 'respir':37,40 'respiratori':7 'sanitari':16,27 'shield':47 'unit':15 'use':6,50,54 'viral':32

ALT-1

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