Abstract: An apparatus for penetrating a casing wall, particularly the casing wall of a detonating or firing mechanism, when disarming an undetonated explosive object, such as a live bomb, includes a drill unit driven by an electric motor and carrier means for carrying the drill unit in substantially any selected position relative to said explosive object. A feed means is arranged for moving in a controllable fashion at least a part of the drill unit holding the drill in the axial direction of said drill, and means are provided for detecting a decrease in the drill torque responsive to penetration of the drill through said wall.

Abstract: An apparatus for concentrating a liquid solution comprises a plurality of spaced-apart plates arranged for rotation about a substantially horizontal axis; means for supplying solution to the surfaces of said plates, said surfaces being arranged to be exposed to heat and/or flowing gas for vaporizing a readily vaporizable constituent from the solution passed to the surfaces of said plates; and means for collecting concentrated products. The plates are provided with an outer layer of open-pore porous material having the ability to absorb solution; and the radially inner regions of said outer layers extend into a storage space for solution to be concentrated, said storage space being shielded from the outer-layer parts exposed to said heat and/or said gas by means of shielding means.