An electric bending endoscope comprises a bending portion arranged to an inserting portion, a bending driving unit and a buffering member. The contacts are also coupled to a test sensor port via a second plurality of passive circuit components, ones of which are coupled in parallel to the test sensor port. After that, a plurality of indices corresponding to a plurality of maximal values in the accumulated cross-correlation result is found out according to the accumulated cross-correlation result. The rail gun control system includes a state space control concept adapted to discrete control events that transition the system from one state to another until the final desired state is reached. The interface controller transmits a plurality of pin control signals to the corresponding slot groups to make the two access addresses of the first memory slot and the second memory slot of a using slot group of the slot groups different from the two access addresses of the first memory slot and the second memory slot of each of the other slot groups. Each ejectable component assembly may include a tray that can be loaded with one or more types of removable module, such as a mini-SIM card and a micro-SIM card, and inserted into the device.