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本文通过对薄壁小型气缸体产生疏松的原因进行分析，找出了关键的三个方面原因，并采取相应的对策，克服了疏松缺陷。
In this paper, we analyze the causes of loosening of thin-walled small cylinder body, find out the key reasons of three aspects, and take corresponding measures to overcome the loose defects.