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.

着绍了电子回旋加器原理，绍了跑道式电子回旋加器的工作原理，并电子回旋加器和电子直线加器的特进行了比较。

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.

本文扶壁式挡土墙进行优化计算,利用优化设计程序参数下的截面状态和工程造价进行分析比较。