I found a copper disc and drilled 7 holes around the edge and one in the center.

我发现了一个铜圆盘和操练了7个孔在边缘附近和一个在中心。

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Being an important system in copper metallurgy, the disc casting machinery and its main constitution were introduced.

圆盘浇铸机是铜冶金工艺中的重要设备。

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Cathodic polarization curve and cyclic voltammetric curve of sulfate copper plating solution are determined with 1286 electrochemical interface and rotating disc electrode.

采用1286电化学接口及旋转圆盘电极测定了硫酸铜镀液阴极极化曲线和循环伏安曲线。

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He said the copper alloy fragments could be linked to a metal disc found with the original hoard by metal detectorist, Terry Herbert, in July 2009.

BBC: Stoke & Staffordshire