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 : report / transmitted by the French Government.
1982
تفصيلات التسجيلة (السجل)
رمز / رقم الاستدعاء[E/ECE/]COAL/GE.4/R.19/Add.6
العنوانDrivage, 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 : report / transmitted by the French Government.
المؤلفونFrance
تاريخGeneva : UN, 11 Aug. 1982.
الوصف
11, [7] p. : charts, tables.