The duplication of animal models plays a key role in spinal cord injury research; however, there has been limited study into normal, external force-derived frac
In order to study the dynamic characteristics of the missile erection system, it can be considered as a rigid-flexible coupling multi-body system. Firstly, the
Currently,traditional development issues,such as economic stagnation,as well as new challenges like environmental degradation and globalization,need attention.S