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欧洲专利:菲利普公司研制。这种器件具有一个真空灯泡,里面含有活化的金属除气剂和附加除气装置。其特点是:在灯泡内附助除气装置是由盛有至少一种过渡金属的无机多孔载体构成的。过渡金属的原子量属下述系列:23—29,41—47和73—79。它们以单一元素或氧化物形式出现。
European Patent: Phillips company developed. The device has a vacuum bulb with an activated metal degassing agent and an additional degassing device. The utility model is characterized in that an auxiliary degassing device in the bulb is composed of an inorganic porous carrier containing at least one transition metal. The atomic weights of transition metals belong to the following series: 23-29, 41-47 and 73-79. They appear as single elements or oxides.