A method and devices are provided to enable continuing a communication session currently carried by a mobile subscriber station while switching from a first base station to a second base station. The apparatus generally includes a cell body having upstanding walls and a fluid drain basin, a rotatable vacuum chuck positioned centrally positioned in the fluid drain basin, and at least 3 substrate centering members positioned at equal radial increments around the rotatable vacuum chuck. Furthermore, the bio-1-alkenes may be converted to biolubricants useful in the transportation sector and other areas requiring high puritythermally stable lubricants. The signal adjustment section may adjust the proportion of the superimposing period so that the proportion of the superimposing period in one frame of the transmission signal increase with increasing the volume of transmission data transmitted between the second communication terminals through the superimposed signal. For each team master stream, the task notifies the operating system that the team is ready to be swapped out when each other thread of the team has saved its state and has quit its stream. If the number of zipper points in the first frame is smaller than the number of zipper points in the second frame, that the field order of the two frames is top field first, otherwise the field order is bottom field first.