16th 7th International Conference on Mining, Material, and Metallurgical Engineering (MMME’20),Ontario, Canada

19th 4th World Congress on Materials Science and Engineering,San Francisco, United States

21st International Conference on Earth Science and Geology,Romanoro, Italy

16th Plenareno Material Science and Nanotechnolgy Conference,Istanbul, Turkey

17th Chemical Engineering and Catalysis World Forum,London, United Kingdom

1st International Conference on Mining and Mineralogy,Munich, Germany

2nd 8th International Conference on Mining, Material, and Metallurgical Engineering (MMME’21),Hlavni Mesto Praha, Czech Republic