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mr Georgi Stoyanchev

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1] mr Georgi Stoyanchev ADVANCED STOOP-AND-ROOM SYSTEM TO THE DEVELOPMENT OF META DEPOSITS IN " - 7. Balkanski rudarski kongres, 26.04.2017.
(https://ekonferencije.com/sr1/rad/advanced-stoop-and-room-system/4987)
Georgi Stoyanchev

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