A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Big calyx drill sinks 1,400-ft holes
Illustrated description of drill assembly for sinking 6-ft drop shafts 1435 ft deep at Canon del Pato hydroelectric power plant in Peru.
Big calyx drill sinks 1,400-ft holes
Illustrated description of drill assembly for sinking 6-ft drop shafts 1435 ft deep at Canon del Pato hydroelectric power plant in Peru.
Big calyx drill sinks 1,400-ft holes
Construction Methods
Construction Methods ; 29
1947
4 pages
Article (Journal)
English
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