YY/T 1497-2016: Evaluation Test Method for the Viral Filtration Efficiency (VFE) of Medical Protective Face Mask Materials - Test Method Using Phi-X174 Bacteriophage Delivery: 9 seconds. Download (and Email) true-PDF + Invoice. Get Quotation: Click YY/T 1497-2016 (Self-service in 1-minute) Newer / historical versions: YY/T 1497-2016 Preview True-PDF (Reload/Scroll-down if blank)
