Through analysis and solves the vibration problems of two uprating units, the process of multi plane field dynamic balancing are studied.

对两台改造机组的异常振动故障进行了分析和现场处理，探讨了运用多平面综合平衡法解决该类振动问题的途径。

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In this paper, the geometric essence of quadratic transformation in plane field is presented after studying the existing quadratic Troms formations.

本文对现有平方变换方法进行了研究，提出了平面场不同平方变换的不同几何实质。

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According to structure features, parallel plane field and axisymmetrical field were used in approximate calculations of core and yoke of the valve respectively.

根据电磁阀的结构特点，将磁芯和磁轭分别按平行平面场和轴对称场近似处理。

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Post would fly the plane. On June twenty-third,nineteen thirty-one, Post and Gatty took off from Roosevelt Field in New York.

VOA: special.2011.04.27

Well I was thinking it's the same reason on 9/11 with regard to the people who flew the plane into the Pennsylvania field as heroes because they chose to kill the people on the plane and not kill more people in big buildings.

我认为这和9·11的时候是一种情况1,那些让飞机在宾州坠毁的人，被视为英雄,因为他们选择了牺牲自己,而不是让飞机撞向大楼牺牲更多人。

耶鲁公开课 - 公正课程节选

Libyan media showed wreckage of the plane spread over a wide field, with rescue and emergency workers on the scene.

VOA: standard.2010.05.12

The plane left Moffett Field in Mountain View near San Francisco just after dawn Friday.

WSJ: Solar plane lands in Ariz., 1st leg of major trip

He recalled the passengers on United Flight 93, who were said to have crashed their plane into a Pennsylvania field to divert it from Washington.

NPR: Obama, McCain Speak At Community Service Forum

In Shanksville, Pennsylvania, where mourners gathered to remember the passengers and crew of United Airlines Flight 93, Deena Burnett remembered her husband, Tom -- one of the passengers thought to have fought with the hijackers before the plane crashed in a field.

CNN: Relatives recite poems, give tribute, try to heal