Masca N99 - dnuy.reeview.it
Respirator masks (such as FFP2, FFP3, N95, N99) should be used in settings where procedures generating aerosols are performed and must be fitted to ensure the right size is worn. The respiratory compensation threshold (RCT) is the stage of high intensity exertion where minute ventilation (the air that can be inhaled and exhaled in 60 seconds ...