Therefore, the study of these impurities on the preparation of aluminum dihydrogen tripolyphosphate specific impact is of great significance, is also a test of this thesis the main objective.
故此，研究这些杂质对制备三聚磷酸二氢铝的具体影响具有重要的意义，也是本次毕业论文试验的主要目的。
Therefore, the study of these impurities on the preparation of aluminum dihydrogen tripolyphosphate specific impact is of great significance, is also a test of this thesis the main objective.
故此，研究这些杂质对制备三聚磷酸二氢铝的具体影响具有重要的意义，也是本次毕业论文试验的主要目的。
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