After the modification of step feed mechanism of deep drill combined machine tool, simplifying structure, convenient adjustment and reducing fault rate have been proved.
对深孔钻屑组合机床分级进给机构进行改进后，达到了简化结构、方便调整、减少故障的目的。
Some main processing parameters are briefly introduced, such as speed of main shaft, feed rate, shape of spinning wheel, deformation rate of each step and structure of template.
对主要工艺参数如主轴转速、进给率、旋轮形状、道次变形率、模板形式等作了简要介绍。
The stability and wave overtopping rate of 3 kinds of revetments (sloping, big step and cylindrical structure types) are studied by using sectional model test.
利用断面物理模型试验，对3种结构形式(斜坡段、大台阶段、圆筒段)的护岸的稳定性和越浪量进行了研究。
The stability and wave overtopping rate of 3 kinds of revetments (sloping, big step and cylindrical structure types) are studied by using sectional model test.
利用断面物理模型试验，对3种结构形式(斜坡段、大台阶段、圆筒段)的护岸的稳定性和越浪量进行了研究。
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