焦点: 1.[数学] [物理学] (二次曲线焦点; 主焦点) focal point; focus 短语和例子虚焦点 virtual focus; 主焦点 principal focus; 焦点分散 defocus2.(问题的关键所在或争论的集中点) central issue; centre; point at issue 短语和例子斗争的焦点 the focus of the
Measurement of the effective focal spot size for industrial x - ray apparatus 工业用x光射线仪有效焦点尺寸的测量
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Effective focus size 有效焦点尺寸
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Non - destructive testing - characteristics of focal spots in industrial x - ray systems for use in non - destructive testing - measurement of the effective focal spot size of mini and micro focus x - ray tubes 无损检验.无损检验用工业x射线系统的焦点特性.小型和微型聚焦x射线管有效焦点尺寸测量
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Non - destructive testing . characteristics of focal spots in industrial x - ray systems for use in non - destructive testing . part 5 : measurement of the effective focal spot size of mini and micro focus x - ray tubes 无损检验.无损检验用工业x射线系统中焦点的特性.第5部分:最小和最大聚焦x射线电子管的有效焦点尺寸的测量