The results show that the copper alloy density by permanent-mold casting attains 99.91% of theory density.

结果表明：经金属型铸造的铜合金密度达到理论密度的99 91%。

youdao

The results show that the copper alloy density by permanent-mold casting attains 99.91% of theory density.

结果表明：经金属型铸造的铜合金密度达到理论密度的99 91%。

youdao