Technical progress in the mechanization of roadway drivage in coal and stone, increase in the share of roadways driven by heading machines : report / transmitted by the Government of Czechoslovakia.
1982
Notice détaillée
Symbole[E/ECE/]COAL/GE.1/R.50
TitreTechnical progress in the mechanization of roadway drivage in coal and stone, increase in the share of roadways driven by heading machines : report / transmitted by the Government of Czechoslovakia.
AuteursCzechoslovakia
DateGeneva : UN, 17 Feb. 1982.
Description
15, 7 p. : diagrams, graphs, tables