A tubular sleeve is coupled to and overlaps the threaded connection between a pair of adjacent tubular members. This invention is the specific subject of a new use of lignans for making cosmetic, pharmaceutical and especially dermatological compounds, used to reduce sebum secretion through topical application. A second region of the first conductivity type is formed in a surface area of the semiconductor layer and close to the trench and contacts the first region. When it is determined that there is one or more sub-maintenance items associated with the selected maintenance item, a CPU provides control to display the sub-maintenance item or items in an operatingdisplay unit. The synchronous memory device includes: a data input unit for calibrating a timing of data inputted in synchronization with a data strobe signal; and a first setup time control unit for detecting an input timing of an OCD control code data inputted to the data input unit in an OCD calibration mode, and for controlling a data output timing of the data input unit.