It is an object to provide an MR system and a floor cover capable of being attached and detached by one operator. The system includes a fluid source, a vacuum source, a support member which defines a cleaning device edge, and a set of cleaning devices. A call is placed to a receiving party. The method may also include creating a new virtual hard disk to accommodate the exceeded predetermined memory storage threshold value. A hollow drill bit rotates about the mandrel via a drive motor and is a guided along a length of the mandrel. The filter unit cell includes a variable capacitor coupled in series between first and second nodes and an inductor coupled in series between the second node and a third node.