A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Props and chocks for mechanised coal mines
Types developed by Dowty Equipment Ltd; operating principle of standard hydraulic prop in service; 20-ton prop with 2-stage hydraulic pump; capsule type relief valve; 80-ton hydraulic chock; twin bar cradle prop; hydraulic walking prop.
Props and chocks for mechanised coal mines
Types developed by Dowty Equipment Ltd; operating principle of standard hydraulic prop in service; 20-ton prop with 2-stage hydraulic pump; capsule type relief valve; 80-ton hydraulic chock; twin bar cradle prop; hydraulic walking prop.
Props and chocks for mechanised coal mines
Engineering
Engineering ; 177
1954
2 pages
Article (Journal)
English
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