Disclosed is an intestinal environment-improving agent including a lactoferrin and bacteria of Lactobacillus brevis as effective ingredients. The network display apparatus also includes a file browser to retrieve a file stored in the external device, a UI unit to allow a file retrieving function to be selected, and a controller to execute the file browser and to control the display unit. The eccentric shaft is rotatably connected between the first vertical support and the second vertical support in the roller. At least one address is assigned to the new routing element.