This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
. .. NIOSH . ru NIOSH NIOSH NIOSH translation of document cdc gov Occupational Exposure Sampling Strategy Manual Nelson Leidel Kennet Busch and Jeremiah Lynch PDUSGov Uploaded with Gas masks of Russia Workplace safety
Page 2023 Free-images.com. All images are Public Domain