Pigment based inks are provided. In the system, a C-shaped arm supports both an X-ray tube and an X-ray detector so that an object-laid tabletop is located between both the tube and the detector. Step two is to generate an accurate of the phase of the downlink synchronization code by removing the frequency drift effect, step three is to determine whether the sequence S1 or S2 is finally detected. A channel, configured to receive an outer edge of an electronic device, is disposed between the first and second flanges to permit a user to transport an electronic device without the need for a satchel or carrying case. The stages of the thermodynamic cycle of the engine occur within these chambers.