The results show that a part of closed ends of the tubes were broken and graphite layer of some nanotubes were tortured while ground for 8h.

实验结果显示球磨8小时后原碳纳米管的封闭端头被打开，并在纳米管壁上产生了扭曲变形的石墨层。

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The present paper is concerned with a problem of limit analysis of thin cylindrical shell with closed ends and different thicknesses under internal pressure.

本文研究充内压端封闭异厚度薄圆柱壳的极限分析问题。

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Closed ends are preferable because they allow a greater degree of squareness and prevent tangling. Grinding the ends permits greater squareness control and inhibits buckling.

封闭两端是可取的，因为它们允许更大程度的垂直和防止纠缠。

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Cornerstone Progressive Return has 93% of its assets in the shares of other closed ends, many trading below the value of their assets.

WSJ: The Intelligent Investor: Yields So High, They Can't Be for Real

Most closed ends distribute varying amounts of dividends and capital gains.

WSJ: The Intelligent Investor: Yields So High, They Can't Be for Real

Now, there are some subtleties to buying bargain closed-ends that go beyond the discount.

FORBES: Finding Bargains in Closed-End Funds