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M50 Joint Service General Purpose Mask
The M50 Joint Service General Purpose Mask is the United States armed forces Field Protective mask, which began service in December 2009, replacing the M40 Field Protective Mask.〔(Military.com: New Gas Mask on the Way )〕
==Description==
The M50 is both OSHA and NFPA certified. The M50 is compact, light, comfortable and more effective as determined by the Defense Department Joint Program Executive Office for Chemical and Biological Defense. The M50 allows for a wide field of view with a single lens that spans the width of the face.〔(Marine Corps fielding new gas mask (M50 Joint Service General Purpose Mask) )〕 The M50 has twin conformal filters, which decreases breathing resistance by 50 percent. This protective mask provides 24 hours continuous eye-respiratory protection in nuclear, biological and chemical (NBC) environments. Another feature is an indicator which turns blue when the filter is expired. 〔(GAS! GAS! GAS! New mask on the way )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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