通过比较定长扣索法的优点在于施工简便，操作容易，节段安装中不需要调整扣索索力，从而对施工控制有一定的参考意义。

The method of limit length of cable advantages in simple construction, easy operation, and no readjustment, it can be used for reference in the construction control.

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本文对主梁的颤振导数识别，采用与主梁颤振分析试验相同的节段模型和测量装置，以自由振动法进行试验。

This paper makes use of free vibration method, using the same model and measuring device to identify the flutter derivatives of the girder.

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目的：探讨节段性分析法在胎儿心脏超声检查中的方法和临床价值。

Objective: To evaluate the clinical method and value of sequential segmental analysis in fetal echocardiography.

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