Methods, systems and computer program products for an N-port network adaptor that is interchangeable between a network switch and a network adaptor. The apparatus includes a transparent substrate, a longitudinal direction of which is arranged in an X axis direction. Another RCD can include a remotely operable clamp device which selectively permits access to an RCD body interior, and a remotely operable safety latch which selectively prevents unclamping of the clamp device. The one-way valve allows gases from the interior of the container to escape from the container during packaging. In addition, the tie layer formed of a copper alloy containing Zn\u2014Ta has a component ratio of Zn in the copper alloy larger than that of Ta, and preferably, includes more than 2. In particular, the present invention relates to a milking system implantable within the teat of an animal which provides improved milking rapidity and decreased mastitis incidence.