Top Heading Mined and Steel Supports
Interior view of bore with steel supports installed.
https://www.codot.gov/travel/ejmt/assets/steel_support_BW.jpg/view
https://www.codot.gov/travel/ejmt/assets/steel_support_BW.jpg/@@download/image/steel_support_BW.jpg
Top Heading Mined and Steel Supports
Interior view of bore with steel supports installed.