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
回旋加
器原理，重
介绍了跑道式回旋加器的工作原理，并对回旋加器
直线加器的特
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.
着重介绍了回旋加器原理，重介绍了跑道式回旋加器的工作原理，并对回旋加器直线加器的特了比较。
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优化计算,利用优化设计程序对不同参数下的截面状态工程造价分析比较。
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