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 Comparison of dust concentrations of uncontrolled dust collector dump to shrouded dust collector dump cdc gov html Dust Control Handbook for Industrial Minerals Mining and Processing CDC Andrew Cecala Andrew Brien Joseph Schall et al other versions PDUSGov
Page 2023 Free-images.com. All images are Public Domain