Techniques and tools for mesh processing are described. Each rear distal bar of the main frame has a pivot aperture. A gas stream comprising an ion having a polarity and traveling at a drift velocity is flowed through the bore from the inlet opening toward the exit opening. The ISB server in turn transmits information concerning the due date and cost of the ISB circuit device and also a reliability evaluation result to the user terminal. The support may be folded into the base. The sheets cover both the mattress and the platform, allowing the sheets to be changed without having to manually lift the mattress.