Abstract: A battery pack includes a battery module configured to accommodate a number of battery cells, and a lower protective cover including a lower panel detachably coupled to a lower portion of the battery module and a number of buffer parts on one surface of the lower panel. A structure of the lower protective cover of the battery pack may be improved to absorb an impact from a lower side of a vehicle. A cross-sectional shape of the buffer part of the lower protective cover may be changed to adjust and design an impact absorption value.

Abstract: A double packer apparatus according to embodiments of the present invention may include a first guide unit provided in a borehole within a ground, a second guide unit provided within the ground to cover an external surface of the first guide unit, a packer unit to support the second guide unit in the borehole, and seal a portion of an area provided within the ground, and a photographing unit to enter the first guide unit and photograph the ground, wherein a portion of the external surface of the first guide unit includes a transparent window for photographing the ground. A ground may be investigated directly using a configuration described in the foregoing, thereby contributing to an enhancement of efficiency.

Abstract: Provided is a wire stripper, and more particularly to an apparatus for easily removing a sheath of a metal wire. The wire stripper effectively and quickly removes the sheath, wherein a sheath of only a required region of the wire is removed.

Abstract: Provided is a wire stripper, and more particularly to an apparatus for easily removing a sheath of a metal wire. The wire stripper effectively and quickly removes the sheath, wherein a sheath of only a required region of the wire is removed.