Abstract: A method for refining molten steel by immersing the lower opening end of a cylindrical immersion tube equipped with a lance into the molten steel contained in a ladle, controlling the pressure in the cylindrical immersion tube to a prescribed pressure range to suck up the molten steel, injecting an agitation gas from the bottom of the ladle towards the surface of the sucked-up molten steel, and decarburizing and refining the molten steel under a reduced pressure, characterized in that the method comprising the steps of; controlling the pressure Pt (Torr) in the cylindrical immersion tube so as to satisfy the following formulae (1) and (2), blowing oxygen gas to the surface of the molten steel through the lance, and decarburizing and refining the molten steel under a reduced pressure; Pt>760−1.297×107/Dc2  (1) K=1.71×Dl0.211×Dc0.438×Wm−1.124×Qg0.519×Pt−0.410>0.

Abstract: In a deflection yoke for a color cathode-ray tube having an electron gun assembly for generating a plurality of electron beams which are directed longitudinally to converge substantially at the center of a screen, and in which a deflection magnetic field is provided through which the beams pass between the gun assembly and the screen so as to be deflected from the center of the screen for scanning the latter; horizontal center raster (HCR) misconvergence of the beams is avoided by providing a closed circuit in which an induced current is generated in response to a leakage magnetic field from the horizontal deflection magnetic field, and such induced current in the closed circuit generates a compensating magnetic field by which the distribution of the horizontal deflection magnetic field, in the longitudinal direction of the beams passing therethrough, is suitably altered.