The present invention discloses a device with an automatic de-skew capability, comprising a data signal delay module, a plurality of data registers, and a delay data signal selection module. An LED thin-film layered structure is fixed to the first surface of the first substrate, and is formed of epitaxially grown inorganic material layers as a P-N junction device. An embodiment of the invention adapted for rotating a tension rod having a terminal end includes a shaft including a socket opening in at least one end of the shaft and a handle connected to the shaft by a unidirectional bearing. The valves and methods are particularly suited, but not limited, to the control of substances such as pressurised fire extinguishing media. Apparatus for carrying out the determination of the risk of developing pre-eclampsia based on the analysis of the serum samples is also provided. Ends of each first conductor line segment overlap the second conductor line segments, and the first and second line segments are connected via through-holes, thereby forming a single spiral conductor line.