control rod free fuel assembly是什么意思

用法例句

On the basis of free-flight trajectory mathematical model, a two-parameter optimization problem of quadrant elevation and rocket ignition time is studied.

建立无控弹道数学模型和大气数学模型 ,研究初始射角和发动机点火时间的双参数寻优以及弹道下落段最佳起始滑翔点的确定 ,建立弹道滑翔段最优控制数学模型 ,研究最优滑翔弹道 。

The composition and features of governer system without controlled working medium, as well as its successful application on 200 MW steam turbine unit, have been presented.

介绍了无控制工质调节系统的组成、特点以及在200MW汽轮机组上的成功应用。