Invention of the point contact transistor by Brattain and Bardeen. ( December 23 ).

12月23日, 布拉顿 和巴丁发明点式电视晶体管.

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SRT - 03 rotary tables fitted with precision four point contact preloaded ball bearings.

SRT-03旋转平台配备有精确的四点接触预装滚珠轴承.

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To do It'successfully, you have to have what's called two point contact.

这样做成功, 你必须有什么所谓的二点接触.

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The single - row four point contact ball slewing ring is composed of two seatring.

单排四点接触球式回转支承,由两个座圈组成,结构紧凑、量轻、球与圆弧滚道四点接触,能同时承受轴向力、向力和倾翻力矩.

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Design methods for point - contact and line - contact manufacturing method are presented based on the shape principle . 2.

据此给出了以此方法构建的点接触加工方法和线接触加工方法的几种设计思路和方案.

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