Abstract: A device for evaluating characteristics of a target ground containing a metal component is proposed. The device includes a penetration probe having a main frame and a pair of side frames respectively installed at opposite side ends of the main frame, wherein each side frame has a lower end thereof extending downward from the main frame; a plurality of electrodes installed to be exposed to outside on the main frame; an electrode measurement part for measuring apparent chargeability of the target ground by applying power for measurement to the plurality of electrodes; and a main processor for calculating a weight ratio of a metal component of the target ground on the basis of the apparent chargeability measured by the electrode measurement part and calculating a volume ratio of the metal component of the target ground on the basis of the calculated weight ratio of the metal component.

Abstract: The packaging box having heat-retaining and cold-retaining functions according to the present invention includes: a box main body including side parts, in which side surfaces are formed by four side walls folded and secured to form a space for storing contents therein, floor parts which respectively extend from the lower portions of the four side walls to form the floor, and lid parts which respectively extend from the upper portions of the four side walls to cover the upper sides of the side parts in openable and closable fashion; and a foamed sheet which protects the contents contained inside the box main body from an external shock and is provided inside the box main body to maintain heat retention and cold retention.

Abstract: A combined indoor fountain-air cleaner. The fountain-air cleaner comprises a lower base part including a base and a water reservoir, which is equipped with a water circulation pump and a nozzle head, a middle part for providing an inner space wherein the fountain is playing and the air is allowed to be circulated so as to cause the impurities floating in the air to be moisturized, an upper cap part covering the middle part and provided with a plurality of air inlet holes, a suction fan assembly for causing the indoor air to be sucked into and to be circulated in the fountain-air cleaner, a baffle board for causing the sucked air to be freely dispersed and to be guided to the inner space of the middle part, a plurality of impurity absorption plates which are adapted for absorbing the impurities in the air and are radially mounted on a lower inner surface of the middle part, and an insert assembly for filtering off the impurities and permitting the water to be silently recovered by the reservoir.