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
子回旋加
器原理，重点介跑道式子回旋加器的
作原理，并对子回旋加器
子直线加器的特点进行比较。
The theory of medical microtron is introduced.The theory of medical runway microtron is expressed and its characteristics are compared with electron linear accelerator.
着重介子回旋加器原理，重点介跑道式子回旋加器的作原理，并对子回旋加器子直线加器的特点进行比较。
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
序对不同参数下的截面状态造价进行分析比较。
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审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。
