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Length of operative piping for hydraulic stowing in Polish collieries in 1955 amounted to 564 km; number of hydraulic stowing installations was 81 in 1955, and will rise to 95 in 1960; requirements of packing material rose to 24,000,000 m3 in 1955, and should reach 30,000,000 m3 in 1960.
Length of operative piping for hydraulic stowing in Polish collieries in 1955 amounted to 564 km; number of hydraulic stowing installations was 81 in 1955, and will rise to 95 in 1960; requirements of packing material rose to 24,000,000 m3 in 1955, and should reach 30,000,000 m3 in 1960.
Hydraulic stowing in Polish coal mines
Min J
Krupinski, B. (author)
Mining Journal ; 250
1958
3 pages
Article (Journal)
English
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