Improvement of reliability of opencast mining techniques in difficult geological, mining and climatic conditions / transmitted by the United Kingdom Government.
1983
详细记录
符号[E/ECE/]COAL/GE.4/R.20/Add.5
标题Improvement of reliability of opencast mining techniques in difficult geological, mining and climatic conditions / transmitted by the United Kingdom Government.
日期Geneva : UN, 30 Nov. 1983.
描述
8 p.