The Bronze Age layers here are 30 feet deep in Yellow River silt.
青铜器时代的遗迹在黄河淤泥下30英尺深的地方。
Before being put into the case, the bronze mirror was covered by a yellow silk pad and then topped with a delicately carved wood cover.
铜镜入匣后先覆以黄绫软托，再盖以雕刻精美的木盖。
The inner leaf is decorated with light blue silk, the front cover page including a realistic painting of the bronze mirror within and yellow slip inscriptions for the mirror and its contents.
内页糊天青色绫，封面内页为所储铜镜的写真画片，并有书写该镜器名及描述的黄签题记；
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