Pronoza V. G. (Dr.Sci.Tech., prof. of OGR GU chair KUZGTA)
Gvozdikova T. N. (Cand.Tech.Sci., associate professor, director of GU KUZGTA in Mezhdurechensk)
Tulenev M. A. (Cand.Tech.Sci., associate professor of OGR GU chairs KUZGTA)
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Extension of standards on purpose of line types in technological drawings of open mining operations
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