In its broadest concept, the present invention relates to an improved gear oil comprising:a) a base oil having a viscosity range of 4 to 32 cSt at 100\xb0 C. The method includes preparing servo codes, which are Gray codes. In response to user commands from the remote control device, the proxy browser retrieves and buffers video and non-video web page data from Internet servers, and sends this data to the remote control device. The indicator is coupled to the guide rod to indicate when the guide rod lies at a desired angle relative to a horizontal axis. The reverse occurs with respect to detecting of a reverse positioning signal. The method comprises the input of patients’ data, the determination of a curvature type of the patient’s spine to be treated from a predefined number of curvature types in dependence on the patient’s data, and the selection of at least one orthosis model from a predefined number of models of orthoses in dependence on the specific curvature type.