参考文献

[1] ISO 17420-2:2021 Respiratory protective devices Performance requirements-Part2:Re-quirements for filtering RPD

[2] EN 136:1998 Respiratory protective devices-Full face masks and quarter masks-Requirements，testing，marking

[3] EN 143:2021 Respiratory protective devices. Particle filters. Requirements， testing，mark-ing

[4] EN 14387:2021 Respiratory protective devices-Gas filter(s) and combined filter(s)-Requirements，testing，marking

[5] BS EN 140:1999 Respiratory protective devices-Half masks and quarter masks-Require-ments，testing，marking

[6] BS EN 405:2001+A1:2009 Respiratory protective devices-Valved filtering half masks to protect against gases or gases and particles-Requirements， testing，marking

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