From its first commercial development in the late 1870s, on through some slight tweaks to size and shape, the bulb has been a glass-and-filament mainstay for more than 130 years.

从它第一次作为商品在19世纪70年代出售以来，这130多年灯泡一直都是由玻璃和灯丝构成，只在尺寸和形状方面经历了一些微小的变化。

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Based on the analysis of the structure, size, and actual work efficiency of an ion source filament insulator in ion implantation system, an optimization design of the filament insulator is presented.

通过对离子注入机离子源灯丝绝缘子的结构、尺寸、实际工作效果等方面的分析，提出了一种注入机离子源灯丝绝缘子的优化设计。

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In addition, with the increasing distance between the filament and the substrate, the crystalline volume fraction and the grain size of poly-Si films notablely decrease.

另外，随着热丝与衬底间距的增大，沉积出的多晶硅薄膜样品的晶化率明显减小，薄膜的晶粒尺寸也相应减小。

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