MIL-F-50057, MILITARY SPECIFICATION: FILTER UNIT, GAS AND PARTICULATE, EMD, 2500 CFM, M11 (30-JUN-1959) [NO S/S DOCUMENT]

MIL-F-50057, MILITARY SPECIFICATION: FILTER UNIT, GAS AND PARTICULATE, EMD, 2500 CFM, M11 (30-JUN-1959) [NO S/S DOCUMENT]., This specification covers one type of filter unit for use in protecting permanent installations against toxic gases and aerosols.