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为了补偿金属液凝固收缩,避免铸件出现缩松缩孔缺陷,而在铸型中附加的用于补充金属液的空腔。也指该空腔内金属液凝固后形成的块体。
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best approximation method
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Be star
Be stars
best asymptotically normal estimate
Best Book Design from All over the World
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bestcash balance
Best Chinese Opera Plays at the 1st NOPC
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Bestia
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