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gas filled tube
释义
gas filled tube
Encyclopedia
工学
充气管
释
gas filled tube
充气管
利用气体放电原理而工作,管内填充气体或金属蒸气的电子管。又称离子管。
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concentric circles
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concentricity
concentricity measurement
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concentric lines
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Concepción
Concepción, Volcáno
concept
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