An arbor mounted disc adjusting apparatus includes a tube that has a first end, a second end and a perimeter wall. In one embodiment, the removable truck deck comprises a replaceable and interchangeable side fitting that may be locked at a desired position along the length of the removable truck deck. A substantially half of a tolerance value of a clearance in a radial direction of the rolling bearing falls in a negative value, under a condition where the rolling bearing is mounted in the auxiliary device. The mux-switch routes the ingress packet traffic of each network port according to the identity of the network port so that at least a copy of the packet traffic of one of the network ports is routed to an instrument port. The cushion positioned over the partial grooves is elastically pressed onto the paper-separating roller. , with standard commercial fruit growing practices, such as pruning, thinning, spraying, irrigation and fertilization.