A memory system includes a memory module including a plurality of memories and a memory controller suitable for controlling an operation timing of each of the memories, wherein the memories enter a refresh operation mode simultaneously in response to a refresh operation command of the memory controller and individually perform a refresh operation according to the operation timing. In this example, each respective command frame of the plurality of command frames includes: an identification of at least one graphical command corresponding to the at least one token, and one or more arguments associated with the at least one token. The information can be analyzed for resonance within the ABS sensor. Attached to the shaft’s inner end is a first seal, while a second seal is attached to the shaft in closely spaced relation to the first seal.