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.
. .. . ru en Figure filtration unit located adjacent to the blast heading used for filtering the contaminated ventilation air from the blast heading after blasting occurs cdc gov html Dust Control Handbook for Industrial Minerals Mining and Processing CDC Andrew Cecala Andrew
Page 2023 Free-images.com. All images are Public Domain