求翻译：不同类型铝合金产品对材料晶粒不断提出更高要求，特别是高延伸率产品、铝箔材，铸造组织的均匀细小是获得良好铝加工产品晶粒尺寸的前提，应如何选择正确的细化剂、加入工艺？应如何评价细化剂的细化效果？是什么意思？

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The different type aluminum alloy product to the material crystal grain proposed unceasingly a higher request, specially the high elongation ratio product, the aluminum foil material, the casting organization even tiny is obtains the good aluminum processing product crystal grain size the premise, h

Different types of aluminium alloy products grains of the material put forward higher requirements, especially the high elongation products, aluminum foil, cast even smaller is a prerequisite for good grain size of aluminum products, how do I choose the right refiner, joined the process? How to eval

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