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.
en. en File with schema passive End of Service Life Indicator developed in the in the USSR to protect employees from hydrogen sulfide The device was made by modification of standard gas canisters ru own AlexChirkin other versions cczero Uploaded with Respirators Occupational safety and health
Page 2023 Free-images.com. All images are Public Domain