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 : consolidated report / transmitted by the Government of Federal Republic of Germany.
1982
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Details
Symbol[E/ECE/]COAL/GE.4/R.19/Add.14
TitleDrivage, 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 : consolidated report / transmitted by the Government of Federal Republic of Germany.
AuthorsGermany, Federal Republic of
DateGeneva ; UN, 26 Feb. 1982.
Description
22 p. : charts