Methods Clinical data of 36 patients with large goiter complicated by tracheomalacia at Xijing Hospital between 1992 and 2004 were retrospectively reviewed.

方法回顾性分析1992 - 2004年本院收治的36例巨大甲状腺肿合并气管软化的临床资料。

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SETTING and MATERIALS:Research was carried out in the Department of Oral Biolo gy, and Department of Nuclear Medicine of Xijing Hospital, Fourth Military Medical University.

地点和材料：实验地点在第四军医大学口腔生物学教研室和西京医院核医学科。

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The essay classifies the complete content of science and technology history in Xijing Zaji as well as analyzes and discusses the account of machinery and physics in the work.

本文将《西京杂记》中科技史的全部内容按照科技史的观点进行了分类，并进一步对有关机械、物理的部分内容进行了分析、探讨。

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