是骨伤科专用名词。Denis 于1983年在Holdworth 二柱理论的基础上创立了三柱理论学说，强调韧带对脊柱稳定的作用。
介绍了三相五柱式消弧线圈的工作原理，单相电弧接地过电压的工频熄弧理论。
The principle of arc-suppression coil with three phases and five columns , and theory of power frequency extinguishing arcing were introduced.
用本文的方法对两端铰支、三角形截面偏心受压缀条柱的试验模型进行了计算，理论计算与试验结果比较符合。
This method has been used to calculate a triangular cross-section latticed column model with both ends hinged and subjected to eccentric load. The theoretical...
根据实测的单元天线方向图，利用几何绕射理论，给出了金属截锥柱侧天线三维辐射场的一种有效的数值分析方法。
On the basis of the experimental element pattern and GTD, an efficient numerical method for analyzing 3-D radiation field of antennas on the truncated cone-cylinder is presented.
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