Drivage, development and support of roadways and faces in deep mines, 1,000 metres and over, and consequently in more difficult mining, geological and atmospheric conditions / transmitted by the Government of Czechoslovakia.
1982
Notice détaillée
Symbole[E/ECE/]COAL/GE.4/R.19/Add.3
TitreDrivage, development and support of roadways and faces in deep mines, 1,000 metres and over, and consequently in more difficult mining, geological and atmospheric conditions / transmitted by the Government of Czechoslovakia.
AuteursCzechoslovakia
DateGeneva : UN, 27 Jan. 1982.
Description
7 p. : table