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真空电子器件烘烤
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真空电子器件烘烤
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baking technique of vacuum electronic device
真空电子器件烘烤
在排气过程中用外部加热的方法对管壳和零件进行除气,再由排气系统排出管外的过程。
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geographic computer simulation
geographic coordinate
geographic coordinates
geographic coordinate system
geographic cyberspace
geographic determinism
geographic distribution of cancers
geographic distribution of cardiovascular and cerebrovascular diseases
geographic distribution of diseases
geographic distribution of diseases related to the lack of food and poor nutrition
geographic distribution of endemic diseases
geographic distribution of high altitude diseases
geographic distribution of infectious diseases
geographic distribution of tropical diseases
geographic diversity
geographic dual economic structure
geographic engineering of ethnicity
geographic entity
geographic entity representation
geographic environment simulation
geographic equator
geographic feature code
geographic feature identifier
geographic feature oriented generalization
geographic graticule map
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