Provided is an impeller of a fuel pump for a vehicle. Alternatively, the storage system can also generate a first set of metadata associated with a first set of stored data, generate a second set of stored data which is a copy of the first set of stored data, generate a second set of metadata associated with the second set of stored data, and compare the first set of metadata and the second set of metadata. The decision is sent by the server to the user device and then used by the user device to implement a new action on the user device. The valve component has a non-expandable prosthetic valve and a self- or balloon-expandable coupling stent for attachment to the base stent, thereby fixing the position of the valve component relative to the base stent. Total thickness of gate dielectric and electrode must less than source electrode or drain electrode. The plurality of vertical grooves may be disposed on a sidewall and a lower portion of the sole.