A male and female connection structure includes a female terminal, and a male terminal to electrically connect to the female terminal by being inserted into a connection position of the female terminal and to electrically disconnect from the female terminal by being withdrawn from the connection position. In an exemplary embodiment, the scraggly structure can be a sawtooth-like structure patterned on a circumferential area of a hollowed portion formed inside the scroll wheel; and an adjusting unit is further comprised of an adjusting rod and a braking part, in which the braking part, being made of an elastic material, can be an elastic strip; and the adjusting rod is formed with screw thread. In other embodiments, modulation in accordance with similar parameters can be applied to other spinal or peripheral locations to address other indications. Then, drive amounts by the drive motors during the microscale driving are calculated. In the opening osteotomies, the correction devices include a wedge member that is disposed within the opened wedge osteotomy and in contact with the vertebral body. The threads are separately routed through a thread course defined by the thread holes, the hollow space and the needle eyes, such that the length of the threads in the thread course maintains same without being affected by a needle bar switching operation.