兑水 发表于 2009-11-18 08:29:51

ASTM F 4-1966 电子管用碳化镍条及碳化镀镍和包镍钢条

F4-66(1999) Standard Specification for Carbonized Nickel Strip and Carbonized Nickel-Plated and Nickel-Clad Steel Strip for Electron Tubes
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