I found a copperdisc 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。
2
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。
3
Cathodic polarization curve and cyclic voltammetric curve of sulfate copper plating solution are determined with 1286 electrochemical interface and rotating disc electrode.