讨论了采用不同的电磁多极场作为动态校正器的可能性.推导了圆形校正透镜、偏转校正场和四极、六极校正场引起的附加象差的公式. The possibility of dynamic aberration correction by using electro - magnetic multipole fields is discussed.
适用规模: 实验室 、 气体分析实验 、 流程节制 、 气体汇流排 、 实验装备.Scope of application: lab, gas analysis and testing, flow control, gas bus - bar, testing equipment.工厂自动化乙太网路 ( EPA ) 是一种以现场汇流排为基础的标准,利用乙太网路连接到现场装置.Ethernet for Plant Automation (...
AntiGlare coating : Does its job well but does make image somewhat fuzzy, nothing worth about though.防强光镀膜: 这个做的还不错但是会让图像有一些的模糊.似乎并不值得这么做.The antiglare films produced by wet roller coat process need to adopt the appropri...
Sister Middleton followed the coffee trolley.护士长米德尔顿跟在送咖啡的推车后面。Dr. Middleton balanced himself, and with an air of benevolent slyness.弥得尔顿博士以慈悲为怀的神气闪烁其辞地把话又说回来.Dr. Middleton bowed to the litany.弥得尔顿博士对这种连祷俯首贴耳.It meant th...
After enduring the hardship of the arduous fieldwork , the prospecting team discovered many new ores.地质勘探队员餐风饮露,历尽辛苦, 找到了不少新的矿藏.In a few years he would be getting too old for the hard fieldwork.再过几年,他就要老了,不能再做这种艰苦的野外作业了....