轴承沟道凹曲面的曲率取负值的翻译：Bearing Raceway surface curvature takes negative values 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Concave curvature of the surface channel bearing a negative value

Bearing Raceway surface curvature takes negative values

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bearings trench Au curved surface curvature of negative value.

Bearing Raceway surface curvature takes negative values