A hydraulically-operated ripper tool is mounted as an attachment on a hydraulic arm of a carrier or excavator and used in a method for demolition of large metal walled structures such as storage tanks in a very short time. The switch comprises a substrate having a front face, a rear face, and a through hole penetrating from the front face to the rear face; a fixed contact extending from an edge portion of the aperture of the through hole towards the inside of the aperture; and a bimorph section holding the traveling contact at a position facing the aperture and driving the traveling contact. This variable width interface portion allows the wrap portion and flap portion to be easily folded over an inserted paint brush of any conventional size. In a telecommunication system, this substantially simultaneous transmission of the first and second data using a similar carrier frequency in a radio frequency communication over a wireless local area network may increase throughput of a downlink, for example, by a factor nominally equal to the number of antennas at an access point. The second data processor executes the program in response to the remote procedure call.