蓝色圆形金属盘背面的五金配件

写实产品静物摄影，俯视特写，白色纯净背景。画面中央是一块圆形深蓝色珐琅或烤漆金属盘，表面有细碎划痕、灰尘斑点与边缘磨损；圆盘背面中央固定着做旧黄铜色金属支架，支架左侧伸出一段空心螺纹金属管，管口朝左，右侧有一枚滚花旋钮，通过细金属杆与中央铆接结构相连。主体充满画面，金属件横向贯穿构图；柔和均匀的摄影棚光，金属高光与蓝色表面微光，整体色调为冷蓝与暗金对比，画幅约4:3。

Realistic product still-life photography, top-down close-up, clean white background. In the center is a circular deep-blue enamel or painted metal disc with fine scratches, dust spots, and worn edges; on the back, an aged brass-toned metal bracket is fixed at the center, a hollow threaded metal tube extends to the left with its opening facing left, and a knurled knob on the right is connected by a thin metal rod to the central riveted structure. The subject fills the frame, with the metal hardware running horizontally across the composition; soft, even studio lighting, metallic highlights and subtle sheen on the blue surface, cool blue and dark gold contrast, approximately 4:3 aspect ratio.