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与"beam entrance"相近的词条

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• beam energy degrader
• beam energy degrading system
• beam energy loss
• beam energy maximization
• beam energy subtraction
• beam entrance
• beam excursion
• beam exit channel
• beam expander
• beam extraction
• beam extractor
• beam falloff
• beam filter
• beam flattener
• beam flux
• beam focusing、beam-focusing

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