It was made using a technique known as heliogravure.
它是由一种叫凹版拍摄的技术完成的。
It is an image of an engraving of a man walking a horse and it was made using a technique known as heliogravure.
照片照的是一幅版画，内容是一个人牵着一匹马在走。它是由一种叫凹版拍摄的技术完成。
It is an image of an engraving of a man walking a horse and it was made using a technique known as heliogravure.
照片照的是一幅版画，内容是一个人牵着一匹马在走。它是由一种叫凹版拍摄的技术完成。
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