Improvement of reliability of opencast mining techniques in difficult geological, mining and climatic conditions / transmitted by the Government of Hungary.
1984
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详细记录
符号[E/ECE/]COAL/GE.4/R.20/Add.4
标题Improvement of reliability of opencast mining techniques in difficult geological, mining and climatic conditions / transmitted by the Government of Hungary.
作者Hungary
日期Geneva : UN, 10 Jan. 1984.
描述
5 p.