金属机械部件特写

工业微距摄影，一个深灰色金属机械部件的特写，主体为长方形金属板，表面有密集的划痕、凹坑和油污，左右两侧各嵌有一个圆形的金属盘状结构，带有齿轮或轴承的质感边缘，材质呈现粗糙的铸铁或合金质感，纯白背景，顶光照明，突出金属表面的高光与纹理，正面平视微距构图，画幅比例约2:1。

Industrial macro photography, close-up of a dark gray metal mechanical component, the main body is a rectangular metal plate covered with dense scratches, dents and oil stains, with a circular metal disc structure embedded on each of the left and right sides, featuring gear or bearing-like textured edges, material shows rough cast iron or alloy texture, pure white background, top lighting, highlighting the specular highlights and textures of the metal surface, front straight-on macro composition, aspect ratio approximately 2:1.