A liquid-phase process is provided for the manufacture from glutaronitriles and related compounds of 2,6-diaminopyridine and related compounds, which are used industrially as compounds and as components in the synthesis of a variety of useful materials. Certain of these conjugates also inhibit leukocyte adhesion and, in particular, leukocyte adhesion mediated by VLA-4. The system includes clamping systems or clamping systems coupled with straight or hinge-shaped connection elements with axially and radially movable tie-in points. The server receives the first signal and the second signal from the room occupancy sensor devices through a data communication network and displays room occupancy information of the plurality of the rooms based on the first signal and the second signal on a display device. A feedstock containing strongly and weakly adsorptive constituents is introduced through the feedstock introducing port into the circulation flow path, and a raffinate rich in a weakly adsorptive constituent is drawn out through the raffinate draw-out port. Locking portions are provided in end portions of the elastic legs, to lock with the other of the attaching member or the attached member, and empty spaces are provided in the auxiliary support pillar, for housing deformed portions of the elastic legs.