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国际协定牌号的加工纯铝及加工铝合金（３）表２—３在美国铝业协会注册的７ＸＸＸ系～ＳＸＸＸ系铝合金的化学成分＠表１及表２脚注①除表示一定范围与最小值的外，其他成分均表示重量百分数最大值。合金化元素和杂质含量的标准极限的表示位数如下：＜０．００１％的……...
(3) Table 2-3 Chemical composition of 7XXX series ~ SXXX series aluminum alloy registered by the American Aluminum Association @ Footnotes in Table 1 and Table 2 ① Except for a range and minimum value Of the other ingredients are expressed as the maximum weight percentage. The standard digits of alloying elements and impurities are expressed as follows: <0.001% ...