The present invention relates to a sink access device which is utilized to facilitate a child or a diminutive person to wash their hands at a lavatory located in a public restroom. The outer member has a distal region forming a cutting window. The feedbox receives the raw coal feed and directs the raw coal onto the deslime screen for separation into coarse and fine sized raw coal fractions. The map data may be processed to identify a map object having a current configuration different from a historical configuration at a time in the past which is determined based on the time selection input. A second measurement member makes the plurality of charged particle beams come incident and multiplies electrons of each of the incident charged particle beams, thereby measuring a relative value of a current of each of the charged particle beams.