Fiber spinning of two polymer compositions wherein one of the compositions contains carbon nanotubes produces structures such as fibers, ribbons, yarns and films of carbon nanotubes. The moving belt is constituted by a plurality of inclined pallets, which are parallel to the noticeably horizontal lower fixed plates, having said pallets the inclination of the moving belt. The voltage detecting circuitry detects the respective voltage values of serially-connected battery modules of the battery equipment. For example, data packets that are sent in response to data packets received from the external network will receive a different classification and thus allocation of resources than data packets not sent in response to previously received packets.