The mine is one of the deepest in South Africa and is a maze of tunnels and levels and has several shafts leading into it. The miners were working up to 2.5 kilometers (1.5 miles) underground in ...
College of Materials, Institute of Artificial Intelligence, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, iChEM, Fujian Key Laboratory of ...
Shanghai Key Laboratory of Magnetic Resonance, State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, P. R. China ...