Expertise sur les masques - Chris Schaefer
4 years ago
14.5K
Expertise sur les masques par Chris Schaefer, spécialiste des respirateurs. Il mesure les niveaux de Co2 et d'oxygène avec divers masques.
Pour plus d'information, voir son compte Linkedin:
https://ca.linkedin.com/in/chrisschaefersafecom
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