以下为句子列表：
英文: The results show that the heat preservation coating and its proper thickness are favorable to the enhancement of filling mold speed of aluminium alloy; the higher the pouring temperature is and the larger the ratio of hollow areas of vertical pouring is,
中文: 结果表明：保温涂料及一定的涂层厚度有利于提高铝液的充型速度；浇注温度越高、直浇道空心面积率越大，铝液充型速度越快；模样厚度太厚或太薄，均会使铝液充型速度降低；一定的直浇道长度及直浇道面积有利于提高铝液的充型速度；施加负压会使铝液的充型速度大大提高，但负压过大会增大铸造缺陷。
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