?铅闸准直差

... 铅蒸气激光器：lead vapour tlaer 铅闸准直差：lead-baffled collimator 铅印刷：stereotype ...

?铅闸准直仪

lead-baffled collimator 铅闸准直差; 铅闸准直仪...

?铅围准直仪

... 硫化铅 lead sulphide 铅围准直仪 lead-baffled collimator 铅等值厚度 lead-equivalent thickness ...