Abstract: A roller comprising a roller body (2) on which a plurality of ribs (4) are arranged, wherein each of the ribs (4) are formed of a number of protrusions (5) which are disposed continually in a direction of the roller shaft, the protrusions (5) are made from materials having a high wear-resisting property. This arrangement not only improve the primary yield of finished products, but also increase the lifetime and wear-resisting property, thereby the primary yield of finished products in present invention is up to 22%-30%, and the lifetime of the roller is up to 15,000-20,000 hours, further the wear loss of the stud is only 2.5 mm per 2,100 hours.

Abstract: An access system and method for transmitting Ethernet signals and mobile communication signals. The system includes a near-end host unit and remote-end user units. Through the near-end host unit, the Ethernet signals and mobile communication signals can be combined. The near-end and remote-end host units are connected through four pairs of twisted pairs. The combined Ethernet and mobile communication signals are sent to a user terminal for providing broadband access service and wireless access service. Premises network resources can be used without re-laying category 5 cables, so the investment is less and it is quick and convenient to provide service. Furthermore there needs to be added only one host unit beside the optical network unit equipment, and replace the user terminal simultaneously. Power is not needed to be taken at the user's home. The placement position of the terminal is flexible without being limited by the power-taking positions.

Abstract: An access system and method for transmitting Ethernet signals and mobile communication signals. The system includes a near-end host unit and remote-end user units. Through the near-end host unit, the Ethernet signals and mobile communication signals can be combined. The near-end and remote-end host units are connected through four pairs of twisted pairs. The combined Ethernet and mobile communication signals are sent to a user terminal for providing broadband access service and wireless access service. Premises network resources can be used without re-laying category 5 cables, so the investment is less and it is quick and convenient to provide service. Furthermore there needs to be added only one host unit beside the optical network unit equipment, and replace the user terminal simultaneously. Power is not needed to be taken at the user's home. The placement position of the terminal is flexible without being limited by the power-taking positions.