A lanthanum oxide powder, a germanium oxide powder, and a strontium carbonate powder are mixed in a ratio so that a composition of the obtained composite oxide LalXm6\u2212nnOp satisfies 8\u2266l+m<10, 0\u2266m\u22662, 0\u2266n\u22662 and 0\u2266p\u22662. Driver files from the driver package, or the entire driver package itself, are then installed in a subdirectory location in a common storage based on the unique identity. Each of the rotatable shapes is associated with at least one respective segment designator to identify at least one of the symbols on that rotatable shape as active for that spin. The nozzle being is engaged with the grasping arm, and the driving mechanism is attached to the base. When the host attempts to read the data, the firewall ensures that only the stated memory area or areas are accessed by the host. 5 nmfilm thickness or more in terms of an absolute value.