钢绞线束使用单筒慢速卷杨机穿设。

The single shell type slow windlass shall be utilized for the steel strands.

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高倍率及大孔径扩束器要求筒长短、口径大、轴上和轴外的像差都要很好地校正，所以光学系统的设计是非常困难的。

It is hard to design for beam expander with high power and wide aperture required, because it is shorten length, larger aperture, as well as on axis and off axis aberration must be corrected properly.

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本文提出的样条有限点法可用于分析各类高层筒体结构，如框筒、核心筒，筒中筒及筒束结构。

In this paper, the spline finite-point method is used to analyze the tube structures, such as framed tube, core, tube in tube and bundle tubes.

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