Apparatus and method for recognizing Global System for Mobile communication signals are provided. Various other methods, systems, and computer-readable media are also disclosed. The width of the plurality of slots is detected and compared to a set value indicative of a desired end slot width and based on this comparison, an adjustor connected to the seaming roller, adjusts the force applied by the seaming roller to the plurality of slots. Also, a bearing is presented having a multiplicity of rotating sleeves. Observation of the ynHAg ion containing the cleaved residue confirms the assignment. , for rows near the spacer walls.