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 the Union of Soviet Socialist Republics.
1982
تفصيلات التسجيلة (السجل)
رمز / رقم الاستدعاء[E/ECE/]COAL/GE.4/R.18/Add.4
العنوانCoal-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 the Union of Soviet Socialist Republics.
المؤلفونUSSR
تاريخGeneva : UN, 16 Aug. 1982.
الوصف
5 p.