An engine contains a compressor stage, a compressor plenum, an inlet valving stage, a PDC stage, a PDC exit nozzle stage, a transition stage, a high pressure turbine stage, a turbine plenum, and a low pressure turbine stage. The base rim with net is installed over and removed from a pre-existing metal goal without the use of a ladder. A signal conductor is disposed with the conveyor. Reflecting elements, for example a Bragg grating, can be arranged on the output waveguide. In this way, image quality is increased when a moving image is displayed with a small amount of circuit. Whereby, the card reader and a flash memory card inserted therein, or other apparatus connected thereto would not be damaged when an overcurrent occurs, and a user may clearly know the exact point on the card reader where the overcurrent occurs.