Many of the earliest books, particularly those dating back to the 1900s and before, are now extremely scarce and increasingly expensive. We are republishing these classic works in affordable, high quality, modern editions, using the original text and artwork. Это и многое другое вы найдете в книге Ore Mining Methods, Comprising Descriptions of Methods of Support in Extraction of Ore, Detailed Descriptions of Methods of Stoping and Mining in Narr (Walter R. Crane)
Ore Mining Methods, Comprising Descriptions of Methods of Support in Extraction of Ore, Detailed Descriptions of Methods of Stoping and Mining in Narr Walter R. Crane (книга)
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