B. Lateral rim of screw hole on CSBP is a weak area.

钉孔外侧缘是钢板薄弱和应力集中部位。

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A weak area of high surface pressure that covers most of North America in winter.

冬季覆盖北美大部分地区的微弱高压。

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A weak area of high surface pressure that covers most of North America in winter.

冬季覆盖北美大部分地区的微弱高压。

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