Coal-getting systems not requiring the presence of men at the face at all times, methods of working coal which do not require the presence of men underground / transmitted by the Government of Czechoslovakia.
1982
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Details
Symbol[E/ECE/]COAL/GE.4/R.18/Add.3
TitleCoal-getting systems not requiring the presence of men at the face at all times, methods of working coal which do not require the presence of men underground / transmitted by the Government of Czechoslovakia.
AuthorsCzechoslovakia
DateGeneva : UN, 22 Jan. 1982.
Description
4 p.