A flexible display apparatus includes a main body, a rotation structure and a signal transfer portion. The cefotiam content of the refined cefotiam hydrochloride obtained by the method of the present invention is not less than 86%, the content of polymeric impurities is less than 0. Either a single large plate heat exchanger or multiple small plate heat exchangers may be employed in the system. The destination printer includes a private encryption key which corresponds to the public encryption key. The trap regions are also formed on side surfaces of the insulating film, and the trap film has a structure in which the trap film is bent upward from the surface of the semiconductor substrate in the trap regions due to the insulating film. Therefore, the clock generation apparatus can cope with a system that required plural clocks, and frequency spread is easily carried out by generating spread information by a frequency spread information generation circuit 90, and adding it in the DTO 121.