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hollow cathode
 hollow cathode
therm.energ. 空心阴极
| source
 source
gen. ; 来源
hydroel.st. 源头; 源点
met. 起源; 原因; 成因
plann. 始点
semicond. 源区

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hollow cathode
therm.energ. 空心阴极
hollow cathode source
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