The following factors having effect on pipe toughness are analysed: line pipe strength and design level, pipe thickness and diameter, medium transported, locations in pipe environmental impact, etc.

管道韧性设计受多方面因素的影响，分别分析了管道钢的强度及设计水平、管壁厚度、管径、输送介质、钢管的不同部位、环境条件等相关的影响因素。

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The industry's assumption has long been that shrinkage of hair-strand diameter which is just 0.075 millimeters for a person with fine-to-medium hair was too small to detect.

WSJ: Old Hair Days: Products to Help Manage Gray and Thinning Hair