The cause of the surface cracks of a bolt bed was analyzed in this paper.

本文分析了飞机前襟翼作动筒连接螺栓底座表面裂纹的形成原因。

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The fatigue life of the surface cracks of the weld toe and the central part of the welding bead are calculated.

又算出了这五种形状角焊缝趾端部和焊肉中央处的表面裂纹疲劳断裂的寿命。

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The strength loss is greaser than the fracture toughness loss, because ofthe surface cracks caused. by thermal fatigue.

由于表面热疲劳裂纹的产生，使得材料强度性能损伤大于断裂韧性损伤。

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He said he had identified holes and road surface cracks mainly where service companies had dug up roads to fix or lay pipes and cabling.

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Potholes are formed by water seeping through cracks in the asphalt surface of a road.

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It has been as a result of cracks in the wells or surface spillages.

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