Coal-getting systems not requiring the presence of men at the face at all times and methods of working coal which do not require the presence of men underground : consolidated report / transmitted by the Government of Union of Soviet Socialist Republics.
1982
Detalles de los registros
Signatura[E/]ECE/COAL/73
TítuloCoal-getting systems not requiring the presence of men at the face at all times and methods of working coal which do not require the presence of men underground : consolidated report / transmitted by the Government of Union of Soviet Socialist Republics.
AutoresUSSR
FechaGeneva : UN, 10 Mar. 1982.
Descripción
1 p.