| 摘要 |
<p>PURPOSE:To shorten a picture-appearing time, and to prevent deformation by reducing a thermal capacity with its thickness made thin, by forming a sleeve constituting an indirectly-heated cathode of alloy composed of 2 to 35 weight % of Cr, 3 to 30 weight % of Co, at least eighter 0.5 to 15 weight % of Fe or 0.5 to 15 weight % of Mo, and Ni for the remainder.</p> |
