Respiration-protection mask with exhaling-valve antechamber...

Details Respiration-protection mask with exhaling-valve antechamber... Respiration-protection mask with exhaling-valve antechamber...

A - Human Necessities

62

B

2/42, 137/1.55

A62B 9/02 (2006.01) A62B 18/02 (2006.01)

Patent

CA 895117

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