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
理，重点介绍了跑道式电子回旋加
工作理，并对电子回旋加和电子直线加特点进行了比较。
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理，重点介绍了跑道式电子回旋加工作理，并对电子回旋加和电子直线加特点进行了比较。
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.
本文对扶壁式挡土墙进行优化计算,利用优化设计程序对不同参
截面状态和工程造价进行分析比较。
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