In a nonvolatile semiconductor memory device in which a plurality of threshold values are set to store multi-level data in a memory cell, bits of multi-bit data are separately written into a memory cell according to an address signal or a control signal to effect the reading and erasing. The first portion defines a rigid valve assembly body having a threaded portion to mount the valve to the shock body. The object to be hidden may be an injury or blemish on the person, such as a cut, scrape or zit, or a blemish on an object, such as a stain on clothing. On disablement a message may display on the wireless communication device that the wireless communication device is in a \u201cdead zone\u201d. In order to improve spectrum subtraction, an estimation of the time delay between the echo-dirtied speech and the prompt echo may also be performed. The hand sanitizer includes a circuit configured to receive an activation signal from a computer system of the fuel pump dispenser.