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clip art clipart svg public domain black and white vintage assembly line car factory industry transportation manufacturing vehicle automobile industrial 剪贴画 黑白 小汽车 汽车 运输

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building clip art clipart svg factory buildings production construction industrial reactor nuclear power electricity radiation 剪贴画 建筑 建筑物

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building clip art clipart svg architecture chimney grey color public domain industry manufacturing 图标 colour smoke industrial 剪贴画 颜色 建筑 建筑物 彩色 灰色

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