The higher impurity composition of tower shell material was the main reason occurring the crack of this type.

而塔体材料中较高的杂质成分，是引起这种开裂的最主要原因。

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Therefore, it is of great significance to study the cooling tower shell with initial geometrical imperfections.

因此对有初始几何缺陷的冷却塔风筒壁的分析研究是很有必要的。

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DJ-3 type tray and patent distributor were adopted to replace the original float valve trays without altering the tower shell.

采用DJ - 3型塔盘及DJ - 3型专利技术分布器替换了原浮阀塔板，实现了不动塔体的技术改造。

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And you've got the Shell Tower behind you,

你身后就是壳牌塔，

关于伦敦眼的回忆 - SpeakingMax英语口语达人

Shell says the tower mode reduces required workers by 40% and improves safety.

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