介绍了一种新型钢板剪切机，该机具有单轴非对称、负偏置结构。
A new plate cutting machine with single axle and asymmetric negative offset is introduced.
计算了对称截面粱在不同边界条件下的高阶固有频率，讨论了转动惯量及剪切变形效应对各阶固有频率的影响。
The high natural frequencies of symmetrical section beam with different constraints are calculated in detail, and effects of rotary inertia and shearing deformation are given.
基于此种实验研究框架，本文对轴对称自由剪切流、变密度轴对称射流以及圆柱尾迹进行了一定的研究。
The dynamics of axisymmetric free shear flows, axisymmetric variable-density jets and wakes of cylinders have been studied, to a certain extent, under this framework.
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