... 铅蒸气激光器：lead vapour tlaer 铅闸准直差：lead-baffled collimator 铅印刷：stereotype ...
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lead-baffled collimator 铅闸准直差; 铅闸准直仪...
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... 硫化铅 lead sulphide 铅围准直仪 lead-baffled collimator 铅等值厚度 lead-equivalent thickness ...
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collimator lead-baffled 铅闸准直仪
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