Both the gravitational gauge field equations for leptons and the gauge field equations of strong gravity for hadrons have been obtained in the torsion and the torsion-free cases respectively.
就有挠和无挠两种情况，分别求得了轻子和强子的引力与强引力的含引力规范场的场方程。
2
The theoretical background of equivalence principle is briefly given, and the experimental tests of the equivalence principle is discussed in detail, via free-fall method and torsion balance.