Objective To discuss the medical coding of two diseases with approximative diagnosis name.

目的：探讨两组诊断名称近似（黑棘皮病与角化棘皮瘤等）疾病的医学编码。

The establishment of approximative mathematical model and approximative calculation are presented.

建立了近似数学模型和介绍了近似计算方法。

Formula for approximative stress calculation of expansion loop is described with a design case cited.

介绍了膨胀环应力近似计算公式及设计实例。

The calculating results of the accurate solution are compared with those of approximative solution through examples.

通过实例，将精确解的计算结果与近似解的计算结果进行了比较。

Researches on the safety of a hole, drilled eccentricly on round plate materials, are done by using an approximative method.

本文用近似方法对圆板偏心开孔的安全性作了探讨。