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Later advancements saw the ends of the can made out of aluminum instead of steel. In 1962, Ermal Cleon Fraze of Dayton, Ohio, invented the integral rivet and pull-tab (also known as rimple or ring pull), which had a ring attached at the rivet for pulling, and which would come off completely to be discarded.

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Keyboard can not do that if we clean up the cracks in the keyboard or not to clear out some debris could be considered a comprehensive clean-up process, each keycap keyboard pull down and pull the best use of a dedicated button, and completely expose the internal structure of non -, then we can use the way you want to fully clean up the internal keyboard.

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The analysis of mechanical interacting between fiber and matrix was presented in this paper,the whole process of fiber pull-out load and pull-out displacement was carried out by using numerical method.

對纖維與基體的相互作用進行了力學分析，完成了纖維拉拔荷載與拉拔位移全過程的數(shù)值計算最新免费a电影网站。

Objective To explore the degree of injury and phase of push-pull effect induced by different degrees of push-pull maneuver on hippocampus neurons in rats.

目的探討不同強度的推拉動作所致的推拉效應對大鼠海馬神經(jīng)元損傷的程度和時相性五级的在线观看黄色网站。

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我喜歡每天停車的時候停一輛LAMBO，而不是什么日產(chǎn)的勞什子亚洲国产三级AV。

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Roger since the invention of the transistor oscillation push-pull single transformer DC converters, is to achieve high-frequency conversion control circuit beginning in 1957 the U.S. investigation self-invented the push-pull Two-transformer, 1964 U.S. scientists have proposed abolition of the frequency of the series switching power supply transformer, as envisaged in this power to the volume and weight of the decline was a fundamental way.

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Biomechanics of should joint at the empty out and transition moment: In the instant of leaving of the left foot, the angle between shoulder and hip was 27°, the angle of pull was 150°, the angle of axis between shoulder was -12°; In the instant of touchdown of the right foot, the angle between shoulder and hip was 72°, the angle of pull was 151°, the angle of axis between shoulder was -85°, the speed of left shoulder was 2.43 m/s, the speed of right shoulder was

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