Abstract: A round-shank pick, comprising a pick head and a pick shank, the pick head including a base part and a cutting element, which is connected to the base part and is composed of a hard material, in particular hard metal, wherein the base part has a wear-resistant layer on the outer surface thereof at the connection to the cutting element, which wear-resistant layer covers at least one segment of the outer surface of the base part facing the cutting element and wherein an end face of the wear-resistant layer facing the cutting element is covered by the cutting element. The base part has an axially oriented cut-out for receiving a fastening segment of the cutting element, the base part has a counter surface facing the cutting element and extending around the cut-out, and the counter surface and the end face of the wear-resistant layer form a continuous flat surface.

Abstract: The invention relates to a pick, in particular a round-shank pick, comprising a pick head and a pick shank, wherein the pick head consists of at least a base part and a cutting element, which is connected to the base part and is composed of a hard material, in particular hard metal, wherein the base part has a wear-resistant layer on the outer surface thereof at the connection to the cutting element, which wear-resistant layer covers at least one segment of the outer surface of the base part facing the cutting element and wherein an end face of the wear-resistant layer facing the cutting element is covered by the cutting element. According to the invention, the base part has an axially oriented cut-out for receiving a fastening segment of the cutting element, the base part has a counter surface facing the cutting element and extending around the cut-out, and the counter surface and the end face of the wear-resistant layer form a continuous flat surface.

Abstract: The invention relates to a superconducting level measuring apparatus for liquid hydrogen in liquid hydrogen vessels, in particular vehicular tanks, a superconductor (1) based on magnesium diboride MgB2 being arranged vertically or inclinedly to the vertical in a liquid hydrogen vessel (5), and a controllable heat source (2) being arranged on the upper region of the superconductor (1), the superconductor (1) being electrically contacted with a controllable current source (3) as well as a voltage measuring apparatus (4) and the level being measured by measuring a voltage. The MgB2 material is preferably employed as a filament wire. Continuous level measurements of high spatial and temporal resolution can be implemented in uncomplicated fashion. The level measuring apparatus and the method are also suitable for level measurement of liquid neon.

Abstract: The invention relates to a superconducting level measuring apparatus for liquid hydrogen in liquid hydrogen vessels, in particular vehicular tanks, a superconductor (1) based on magnesium diboride MgB2 being arranged vertically or inclinedly to the vertical in a liquid hydrogen vessel (5), and a controllable heat source (2) being arranged on the upper region of the superconductor (1), the superconductor (1) being electrically contacted with a controllable current source (3) as well as a voltage measuring apparatus (4) and the level being measured by measuring a voltage. The MgB2 material is preferably employed as a filament wire. Continuous level measurements of high spatial and temporal resolution can be implemented in uncomplicated fashion. The level measuring apparatus and the method are also suitable for level measurement of liquid neon.