Disclosed is an information processing system in which a high-order apparatus and a low-order apparatus are connected so as to be capable of bidirectional communicating. The scraper, hauler and compacter cleans and levels the floor of a chicken house as the scraper is being pulled by a tow vehicle such as a small tractor. The plate may be made up of teeth with a separation and angle orientation that are selected in accordance with the desired arrangement of the fibers andor filaments in the nonwoven web. The lens including at least a portion that snappingly engages the groove when a portion of the lens is inserted into the slot. The micro-lens module satisfies following conditions: 1. The bulk nano-structured low carbon steel is a plate having a thickness of not less than 5 mm or a bar having a diameter of not less than 5 mm.