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US5220238A Cathode structure for an electron tube and method of constructing it 失效
电子管的阴极结构及其构造方法

Cathode structure for an electron tube and method of constructing it
Abstract:
A cathode structure for an electron tube that includes a cathode sleeve, an upper heat radiation part blackened by the oxidation of the Cr contained therein in order to increase the rate of the heat radiation, a lower supporting part covered by a nickel layer for preventing the oxidation of Cr, and a cathode sleeve holder that is connected to the lower supporting part by resistance welding.
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