求翻译：铝合金铸件由于零件结构、材料种类和铸造工艺的不同，导致产生气孔缺陷的机理有所不同。本文结合生产实际，在分析三种铸造铝合金ZL104典型铸造气孔缺陷形成机理的基础上，分别给出对应的工艺改进措施。是什么意思？

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Aluminum alloy casting as a part structure, type of material and the casting process, resulting in holes of the defect is different. This combined with production in the analysis of 3 cast aluminum alloy ZL 104 typical casting defects pinholes form on the basis, for the corresponding process improve

The aluminum alloy casting as a result of the components structure, the material category and the casting craft difference, causes to produce the blowhole flaw mechanism to differ from.This article in coor with progress of production reality, in analyzes three kind of casting aluminum alloy ZL104 ty

Because parts of the structure, material type and casting aluminum alloy casting process is different, resulting in different from the mechanism of blowhole defects. Based on actual production, analysis of three typical casting of cast aluminum alloy ZL104 porosity formation mechanism on the basis o

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