Instead of using a single fuselage cylinder, they used two partial cylinders placed side by side to create a wider structure whose cross-section resembles two soap bubbles joined together.

该机型不再使用单体圆柱形机身，而改用两个半圆柱形机身并排的设计，这样形成了更宽大的结构，从横截面上看，有如两个连在一起的肥皂泡。

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When the box section design boom and a reasonable cross-section are put in danger of partial reinforcement, the arm can have good stiffness, strength, vibration stability.

当箱型臂截面设计合理且在危险截面处实施局部补强后，可使臂架具有良好的刚度，强度，振动稳定性。

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Calculations show that polarization degree of partial polarized light beam present certain distribution on the cross section of reflected output beam from interface.

计算表明一定偏振度的入射部分偏振光束经界面反射后，反射光束偏振度由于界面反射在反射光束截面上将产生一定分布。

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