Cannabis Ruderalis

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English: Three Key Factors Required for a Respirator to be Effective
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Source https://www.cdc.gov/niosh/npptl/pdfs/KeyFactorsRequiedResp01042018-508.pdf
Author U.S. National Institute for Occupational Safety and Health
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This image is a work of the National Institute for Occupational Safety and Health, part of the Centers for Disease Control and Prevention in the United States Department of Health and Human Services, taken or made as part of an employee's official duties. As a work of the U.S. federal government, the image is in the public domain.

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Other versions File:Three Key Factors Required for a Respirator to be Effective (Spanish).jpg - Spanish version

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Date/TimeThumbnailDimensionsUserComment
current22:38, 28 March 2020Thumbnail for version as of 22:38, 28 March 20201,250 × 833 (1.81 MB)John P. Sadowski (NIOSH)Transferred from https://www.cdc.gov/niosh/npptl/pdfs/KeyFactorsRequiedResp01042018-508.pdf
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