The invention relates to a valve, comprising a body, within which a needle moves, which can rest with sealing against a seat, fixed to the body. The disclosure is applied to a generic microprocessor architecture with a set of controlling elements and a set of groups of sub-processing elements. This configuration can enhance the confidentiality of encrypted data because the key data is not leaked even when the recording medium in which key data of the encrypted data is recorded is carried away. The composition can be useful as a reagent for the synthesis of zero-valent metallic elemental nanoparticles. The conventional access method has the drawback of ineffective use of the memory space of the de-interleaving unit, while the proposed method uses only about half the memory space for implementation. The socket body has a guide portion located forward of the collar and adjacent to the forward end edge of the collar to prevent the forward end of the plug as inserted into the socket from engaging with the forward end surface of the collar and to guide the forward end of the plug into the collar.