Two novel spherical helical antennas are designed by projecting the planar equiangular spiral antenna onto the surfaces of hemisphere and partial sphere.

将平面等角螺旋天线投影到半球面和部分球面上，得到半球面螺旋天线和部分球面螺旋天线两种新型球面螺旋天线。

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The spherical gradient refractive index micro-lens with small volume and short optical path can be easily shaped and conveniently adjusted, and has no spiral rays and low spherical aberration.

球对称梯度折射率微球透镜具有体积小、光路短、外形易加工、使用易调整，且无螺旋光线、像差小等优越性能。

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The spiral stairway is one of the main auxiliary equipments of large spherical vessels.

作为大型球形容器主要附属设备之一的盘梯，其最佳设计方案应该是等倾角上升的。

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Allison Armour-Wilson and Peter Rogers combine an all-white herbaceous border with futuristic spiral sculptures and a pool with a spherical fountain.

ECONOMIST: Where are the flowers? | The