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使电子注内空间电荷发散力、离心力和磁聚焦力之间达到平衡,使电子注没有波动或波动很小的电子注聚焦方法。
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The Free World and the Inevitable One
The French Ambassadors
the French Doctrinaires
The French Institute of Science and Technology for Transport,Development and Networks
The French Lieutenent’s Woman
The French National Higher School of Library and Information Science
The French National Institute of Sport
The French new wave cinema
The Frenzy of Orlando
The Frick Collection
the frigid Qinghai-Xizang Plateau of China
The frog meridian of yellow Emperor
The Frogs
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The Frontier
The Frontier Health and Quarantine Law of the People's Republic of China
The Front the Poet Group
the fugitives
the Fujian Poets’Club
the function of Pu-239 and Pu-240 as an environmental indicator
the function of the criminal law
the function of the mass media
The Functions of Social Conflict
the fundamental principles of international economic law
the fu oeuvre of King of Huainan
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