The quadratic aperture of the cat's-eye diaphragm is imaged too large . 猫眼光栏的方形光孔成象太大。
To minimise the temperature gradient across the sample , the light aperture in the block is only 2 . 5mm ? 为了减小样品上的温度梯度,台体上的光孔直径只有2 . 5毫米。
Capability detail specification : single and double sided printed boards with plain holes ; german version en 123100 - 800 : 1992 性能详细规范:带光孔的单面和双面印制电路板
System of quality assessment - sectional specification - rigid single - sided and double - sided printed boards with plain holes 质量评估体系.分规范.带光孔的刚性单面和双面印制板
System of quality assessment - capability detail specification - rigid single - sided and double - sided printed boards with plain holes 质量评估体系.性能详细规范.带光孔的刚性单面和双面印制板