比较式

The theory of medical microtron is introduced.The theory of medical runway microtron is expressed and its characteristics are compared with electron linear accelerator.

着重介绍了电子回旋加原理，重点介绍了跑道式电子回旋加工作原理，并对电子回旋加和电子直线加特点进了比较。

Counterfort retaining walls are optimized in the paper, using the optimum program, costs of different counterfort retaining wall parameters were calculated and based on the contrast analysis.

本文对扶壁式挡土墙进计算,利用设计程序对不同参数下截面状态和工程造价进分析比较。