An electric-powered shaving apparatus with a drive part excitable by an electric motor into performing an oscillatory motion, the drive part transmitting its motion for cutting hairs to a short-hair cutter and to a long-hair trimmer. Based on those pieces of mapping information, the SAN manager outputs a corresponding relationship between virtual and real volumes. The compound stream includes two or more logical data streams to emulate congestion control behavior of multiple separate network connections. The liquid supplying mechanism cooperates with one of a lens moving mechanism that moves the immersion objective lens and a sample moving mechanism that maintains and moves the sample, and moves the nozzle relative to the immersion objective lens to supply the liquid.