A bearing arrangement of a shaft is provided, with which an annular bearing sleeve is applied onto the shaft. The network communication unit transmits radio signals to communication network via a base station. The stand may include a support connected to a lower portion of the display, a pivot block pivotably coupled to the support, a rear base connected to the pivot block, a swivel that pivotably couples the pivot block and the rear base, and a front base coupled to the rear base. Re at an arbitrary wavelength in a visible light region is 80 nm to 201 nm, an Nz value represented by the following equation is 0. The cartridge is released for removal by a tongue inserted between the lip members, thereby separating them by displacement.