Use of a kinked rigid-rod polyarylene of a particular type for its fire resistance properties. The useful frequency band is split into two frequency bands and the repeater amplifies the signals from one of the bands and translates them to the other band. In particular embodiments, the anchor device can be adjusted to a folded condition so that subcutaneous anchors are partially rotated prior to removal from the skin penetration point. At least one lubrication conduit leads to lubrication sites of the spindle nut and is arranged in the spindle nut so that when the spindle nut is in abutment against the stop surface, the lubrication conduit is joined to the housing-side lubrication passage. Moreover, the method includes: determining a state stage by using data in first, second, third and fourth non-volatile memory areas if a power shut-down occurs during execution of the write command; and, executing a recovery process in accordance with the determined state stage. The traffic may be multiplexed based on weights, associated with each application, and key performance indicators associated with the networks.