桥式起重机三维模型

3D CAD工程渲染风格，浅灰色金属材质的桥式起重机模型，横置宽幅构图，主体居中偏侧前方视角。长条形箱型主梁横跨画面，两端连接端梁和圆盘状车轮组，主梁中部安装圆柱形卷扬滚筒、齿轮组和钢丝绳，下方垂挂双绳吊钩。所有表面为统一浅灰金属灰模材质，细节包含螺栓、轴座和轨道夹持结构。纯白无纹理背景，均匀柔和的正侧光，无强阴影，工业设计展示图，宽画幅比例约2.5:1。

3D CAD engineering render style, light gray metal overhead bridge crane model, horizontal wide composition, centered slightly front-side view. A long box-girder main beam spans the frame, connected at both ends to end trucks and disc-shaped wheel assemblies. In the middle of the main beam is a cylindrical hoist drum, gear sets, and steel wire ropes, with a double-rope hook hanging below. Uniform light gray metal gray-model material, details include bolts, shaft mounts, and rail clamping structures. Pure white untextured background, even soft front-side lighting, no harsh shadows, industrial design presentation, wide aspect ratio about 2.5:1.