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螺孔延伸有利于增加连接柔度，容许大变形的发生。
The elongation increased joint flexibility, allowing larger deformations without further fracture.
youdao
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螺孔延伸有利于增加连接柔度，容许大变形的发生。
The elongation increased joint flexibility, allowing larger deformations without further fracture.
youdao