Institute of Innovative Physics in Fuzhou;
Fuzhou;
China;
General; Relativity; The; Einstein’s; Equation; of; Gravity; Field; Axially; Symmetrical; Solutions; Singularity; Kerr; Metric; Kerr-Newman; Metric; Gravitational; Field; of; Static; Thin; Loop; Gravitational; Field; of; Double; Spheres; Black; Hole; Quasar; MECO;