Ore mining methods, comprising descriptions of methods of support in extraction of ore, detailed descriptions of methods of stoping and mining in narrow and wide veins and bedded and massive deposits including stull and square-set mining, filling and cavi
Автор: Walter Richard Crane, 267 стр., издатель: "Книга по Требованию", ISBN: 978-5-8836-6680-2| Под заказ: | ||||
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4 из 5, 7 голос(-ов).