He drew a linear diagram.

他画了一个直线的表格。

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Under a given condition, strength expressions of rod string is discussed and a linear diagram is derived which can be used to check the strength of rod string.

在某一给定条件下，对满足抽油杆柱强度要求的关系式进行了讨论，并绘制出了可校核抽油杆柱强度的线性关系图版。

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Defects of representation for data structure is pointed out firstly , and an object-oriented solution is put forward, finally an OOA class diagram of linear data structure system is given.

论文指出了现有的数据结构描述方法的不足，提出了面向对象的解决方案，最后给出了线性数据结构系统的OOA类图。

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