灰色机械板件纵向序列

工业CAD三维渲染风格，纯白无缝背景上纵向排列七个灰色扁平机械零件，材质为哑光金属或工程塑料，边缘略圆角，表面无纹理；零件外形包含半圆扇形、倾斜矩形延伸部、圆形通孔和圆柱凸起，自上而下呈序列排布；正面略俯视的等距视角，全景展示，均匀柔和棚拍光，无明显阴影，窄长竖幅构图，画幅比例约1:6。

Industrial CAD 3D render style, seven gray flat mechanical parts arranged vertically on a seamless pure white background, matte metal or engineering plastic material, slightly rounded edges, smooth untextured surfaces; shapes include semicircular fan sections, angled rectangular extensions, circular through holes, and cylindrical bosses, arranged in a top-to-bottom sequence; front-facing slight overhead isometric view, full shot, even soft studio lighting, no obvious shadows, narrow vertical composition, aspect ratio about 1:6.