J-GLOBAL ID:201602006242394084   Reference number:58A0074929

Scrapers are winched up 62 per cent slope for huge cut.

Volume: 55  Issue:Page: 14-17,19-22  Publication year: 1958 
JST Material Number: B0316A  ISSN: 0010-7905  CODEN: CEGIA   Document type: Article
Country of issue: United States (USA) 
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